Half-Marathon https://greenmedinfo.com/category/keywords/Half-Marathon en Half the runners (54.1%) reported a history of back pain. Among them, almost twice as many reported an improvement (49%) than a worsening (27%) of pain with running. https://greenmedinfo.com/article/half-runners-541-reported-history-back-pain-among-them-almost-twice-many-repor PMID:  Rev Med Suisse. 2015 Jul 15 ;11(481):1438, 1440-4. PMID: 26398973 Abstract Title:  [Runners with back pain: to run or not to run?]. Abstract:  We evaluated the perceived impact of physical activity on back pain in runners. Information from 777 runners participating in a half marathon was obtained with a questionnaire about basic data, features of the weekly training and the relationship between running activity and back pain. Half the runners (54.1%) reported a history of back pain. Among them, almost twice as many reported an improvement (49%) than a worsening (27%) of pain with running. No significant associations were found between perceived impact of running on back pain and other factors. In our study favorable effects were much more frequent than unfavorable ones. Further studies are needed to better understand these effects. <p><a href="https://greenmedinfo.com/article/half-runners-541-reported-history-back-pain-among-them-almost-twice-many-repor" target="_blank">read more</a></p> https://greenmedinfo.com/article/half-runners-541-reported-history-back-pain-among-them-almost-twice-many-repor#comments Back Pain Exercise: Running Half-Marathon Human Study Mon, 15 Jan 2018 02:18:14 +0000 greenmedinfo 158394 at https://greenmedinfo.com A comparison of the physiological demands imposed by competing in a half-marathon vs. a marathon. https://greenmedinfo.com/article/comparison-physiological-demands-imposed-competing-half-marathon-vs-marathon PMID:  J Sports Med Phys Fitness. 2017 Nov ;57(11):1399-1406. Epub 2017 Feb 21. PMID: 28222581 Abstract Title:  A comparison of the physiological demands imposed by competing in a half-marathon vs. a marathon. Abstract:  BACKGROUND: While there is widespread scientific information about the physiological challenges imposed on elite endurance runners during competitions, the information regarding the amateur population is scarce. The aim of this study was to compare the physical and physiological load imposed by competing in a real half-marathon vs. a marathon race.METHODS: From a larger group of participants, we selected 22 experienced runners who were matched in pairs (11 marathoners and 11 half-marathoners) for age and anthropometric data. Participants completed their respective distances on the same day and circuit while race time was measured by means of chip timing. Sweat samples were obtained during the race using sweat patches. Before and after the race, a sample of venous blood was obtained and jump height was measured during a countermovement jump. Participants also rated their perception of leg muscle pain at the end of the race.RESULTS: Running pace was similar for half-marathoners vs. marathoners (3.3±0.4 vs. 3.1±0.4 m·s-1; P=0.36). At the end of the race, jump height reduction (-11±12% vs. -25±19%; P=0.03), serum myoglobin concentration (186.1±93.6 vs. 564.1±370.7 µg·mL-1; P<p><a href="https://greenmedinfo.com/article/comparison-physiological-demands-imposed-competing-half-marathon-vs-marathon" target="_blank">read more</a></p> https://greenmedinfo.com/article/comparison-physiological-demands-imposed-competing-half-marathon-vs-marathon#comments Half-Marathon Marathon Running Human Study Mon, 15 Jan 2018 02:01:51 +0000 greenmedinfo 158387 at https://greenmedinfo.com Carbohydrate-based fuels predominates during half-marathon running. https://greenmedinfo.com/article/carbohydrate-based-fuels-predominates-during-half-marathon-running PMID:  J Appl Physiol (1985). 2016 Jan 15 ;120(2):107-13. Epub 2015 Nov 19. PMID: 26586912 Abstract Title:  Altering fatty acid availability does not impair prolonged, continuous running to fatigue: evidence for carbohydrate dependence. Abstract:  We determined the effect of suppressing lipolysis via administration of nicotinic acid (NA) on fuel substrate selection and half-marathon running capacity. In a single-blinded, Latin square design, 12 competitive runners completed four trials involving treadmill running until volitional fatigue at a pace based on 95% of personal best half-marathon time. Trials were completed in a fed or overnight fasted state: 1) carbohydrate (CHO) ingestion before (2 g CHO·kg(-1)·body mass(-1)) and during (44 g/h) [CFED]; 2) CFED plus NA ingestion [CFED-NA]; 3) fasted with placebo ingestion during [FAST]; and 4) FAST plus NA ingestion [FAST-NA]. There was no difference in running distance (CFED, 21.53 ± 1.07; CFED-NA, 21.29 ± 1.69; FAST, 20.60 ± 2.09; FAST-NA, 20.11 ± 1.71 km) or time to fatigue between the four trials. Concentrations of plasma free fatty acids (FFA) and glycerol were suppressed following NA ingestion irrespective of preexercise nutritional intake but were higher throughout exercise in FAST compared with all other trials (P<p><a href="https://greenmedinfo.com/article/carbohydrate-based-fuels-predominates-during-half-marathon-running" target="_blank">read more</a></p> https://greenmedinfo.com/article/carbohydrate-based-fuels-predominates-during-half-marathon-running#comments Half-Marathon Human Study Mon, 15 Jan 2018 02:16:07 +0000 greenmedinfo 158393 at https://greenmedinfo.com Chronic daily oral supplementation of spinach has alleviating effects on known markers of oxidative stress and muscle damage following a half-marathon in well trained healthy young men. https://greenmedinfo.com/article/chronic-daily-oral-supplementation-spinach-has-alleviating-effects-known-marke PMID:  J Sports Med Phys Fitness. 2015 Jun ;55(6):609-14. Epub 2014 Jun 12. PMID: 24921623 Abstract Title:  The effect of spinach supplementation on exercise-induced oxidative stress. Abstract:  AIM: Nutritional supplements have been very popular among athletes and individuals. Spinach is an important dietary vegetable rich in antioxidants which is commonly consumed. This study was conducted to assess the effects of chronic daily spinach supplementation on known markers of oxidative stress and muscle damage following half-marathon in well-trained healthy young men.METHODS: Twenty well-trained men volunteered for this study. Participants were randomized in an open study placebo-controlled fashion into two groups: Spinach (S) (N.=10) and placebo (P) (N.=10). The participants took spinach supplementation or placebo daily for 14 days before running. Participants ran 21.1 km. The spinach supplementation was prepared at 1 g/kg body weight. Total antioxidant capacity (TAC) was determined as marker of plasma antioxidant capacity. Creatine kinase (CK) was measured as marker of muscle damage and malondialdehyde (MDA), protein carbonyl (PC) and uric acid were measured as markers of oxidative stress.RESULTS: TAC significantly elevated after supplementation in S group (P<p><a href="https://greenmedinfo.com/article/chronic-daily-oral-supplementation-spinach-has-alleviating-effects-known-marke" target="_blank">read more</a></p> https://greenmedinfo.com/article/chronic-daily-oral-supplementation-spinach-has-alleviating-effects-known-marke#comments Exercise-Induced Tissue Damage Oxidative Stress Spinach Malondialdehyde Down-regulation Half-Marathon Human Study Mon, 15 Jan 2018 13:52:52 +0000 greenmedinfo 158402 at https://greenmedinfo.com Evaluation of hydration status by urine, body mass variation and plasma parameters during an official half-marathon. https://greenmedinfo.com/article/evaluation-hydration-status-urine-body-mass-variation-and-plasma-parameters-du PMID:  J Sports Med Phys Fitness. 2017 Nov ;57(11):1499-1503. Epub 2017 Jan 13. PMID: 28085125 Abstract Title:  Evaluation of hydration status by urine, body mass variation and plasma parameters during an official half-marathon. Abstract:  BACKGROUND: The aim of this study was to verify the agreement of urine, body mass variations and plasma parameters to determine the hydration status of 14 male runners (29±4 years and 54.3±5.5 mLO2/kg/min) in an official 21.1 km road race.METHODS: The mean dry-bulb temperature and air relative humidity during the road race were 25.1±2.1 °C and 54.7±2.2%, respectively. The volume of water ingested by the runners was monitored using marked volumetric plastic bottles provided at the hydration stations located at 0, 2.5, 5.0, 7.5, 10.5, 14.0, 16.0 and 18.5 km from the starting line. Hydration status was assessed using urine specific gravity (USG), urine osmolality (UOSM) and plasma osmolality (POSM). Furthermore, body mass variation (∆BM) was assessed by comparing body mass (BM) immediately prior and after the race. Total sweat was estimated by ∆BM, added water volume ingested and deducted blood volume collected. Thesweat rate was calculated through total sweat and total exercise time.RESULTS: The mean water intake was 0.82±0.40 L, and the mean sweat rate and total sweating were 1440.11±182.13 mL/h and 2.67±0.23 L. After the race, the BM reduced by 1.7±0.4 kg. The ∆BM was -2.41±0.47%, and the plasma volume variation was -9.79±4.6% between pre- and post-running measurements. Despite the POSM increased post-racecompared to pre-race, the UOSM and USG did not change. No significant correlations were found between POSM variation with UOSM variation (r=-0.08; P=0.71), USG variation (r=-0.11; P=0.78) or ∆BM (r=0.09; P=0.77).CONCLUSIONS: In conclusion, this study shows that both∆BM and ∆POSM indicated a hypohydration state after exercise even though the ∆BM did not correlate significantly with ∆POSM. These results demonstrate that ∆BM is a practical method and can be sufficiently sensitive to evaluate the hydration state, but it should be utilized with caution. <p><a href="https://greenmedinfo.com/article/evaluation-hydration-status-urine-body-mass-variation-and-plasma-parameters-du" target="_blank">read more</a></p> https://greenmedinfo.com/article/evaluation-hydration-status-urine-body-mass-variation-and-plasma-parameters-du#comments Half-Marathon Human Study Mon, 15 Jan 2018 02:04:29 +0000 greenmedinfo 158388 at https://greenmedinfo.com Finding: foot strike pattern and running speed are responsible for spatio-temporal differences among runners of different performance level. https://greenmedinfo.com/article/finding-foot-strike-pattern-and-running-speed-are-responsible-spatio-temporal- PMID:  PLoS One. 2018 ;13(1):e0191688. Epub 2018 Jan 24. PMID: 29364940 Abstract Title:  Similarities and differences among half-marathon runners according to their performance level. Abstract:  This study aimed to identify the similarities and differences among half-marathon runners in relation to their performance level. Forty-eight male runners were classified into 4 groups according to their performance level in a half-marathon (min): Group 1 (n = 11,<p><a href="https://greenmedinfo.com/article/finding-foot-strike-pattern-and-running-speed-are-responsible-spatio-temporal-" target="_blank">read more</a></p> https://greenmedinfo.com/article/finding-foot-strike-pattern-and-running-speed-are-responsible-spatio-temporal-#comments Exercise: Endurance Exercise: Running Half-Marathon Human Study Tue, 06 Feb 2018 17:02:34 +0000 greenmedinfo 159343 at https://greenmedinfo.com Intracellular water is related to half-marathon race time. https://greenmedinfo.com/article/intracellular-water-related-half-marathon-race-time PMID:  Nutr Hosp. 2015 Dec 1 ;32 Suppl 2:10405. Epub 2015 Dec 1. PMID: 26615324 Abstract Title:  Intracellular water is related to half-marathon race time. Abstract:  Conclusions: Our findings suggest the importance of hydration status, particularly with ICW, in relation to endurance sports. <p><a href="https://greenmedinfo.com/article/intracellular-water-related-half-marathon-race-time" target="_blank">read more</a></p> https://greenmedinfo.com/article/intracellular-water-related-half-marathon-race-time#comments Dehydration Half-Marathon Human Study Mon, 15 Jan 2018 02:13:56 +0000 greenmedinfo 158391 at https://greenmedinfo.com On site assessment of cardiac function and neural regulation in amateur half marathon runners. https://greenmedinfo.com/article/site-assessment-cardiac-function-and-neural-regulation-amateur-half-marathon-r PMID:  Open Heart. 2014 ;1(1):e000005. Epub 2014 Feb 11. PMID: 25332775 Abstract Title:  On site assessment of cardiac function and neural regulation in amateur half marathon runners. Abstract:  OBJECTIVE: Strenuous exercise variably modifies cardiovascular function. Only few data are available on intermediate levels of effort. We therefore planned a study in order to address the hypothesis that a half marathon distance would result in transient changes of cardiac mechanics, neural regulation and biochemical profile suggestive of a complex, integrated adaptation.METHODS: We enrolled 35 amateur athletes (42±7 years). Supine and standing heart rate variability and a complete echocardiographic evaluation were assessed on site after the completion of a half marathon (postrace) and about 1 month after (baseline). Biochemical tests were also measured postrace.RESULTS: Compared to baseline, the postrace left ventricular end-diastolic volume was smaller, peak velocity of E wave was lower, peak velocity of A wave higher, and accordingly the E/A ratio lower. The postrace heart and respiratory rate were higher and variance of RR interval lower, together with a clear shift towards a sympathetic predominance in supine position and a preserved response to orthostasis. At baseline, athletes were characterised by a lower, although still predominant, sympathetic drive with a preserved physiological response to standing.CONCLUSIONS: Immediately after a half marathon there are clear marks that an elevated sympathetic cardiac drive outlasts the performance, together with decreased left ventricular diastolic volumes and slight modifications of the left ventricular filling pattern without additional signs of diastolic dysfunction or indices of transient left or right ventricular systolic abnormalities. Furthermore, no biochemical indices of any permanent cardiac damage were found. <p><a href="https://greenmedinfo.com/article/site-assessment-cardiac-function-and-neural-regulation-amateur-half-marathon-r" target="_blank">read more</a></p> https://greenmedinfo.com/article/site-assessment-cardiac-function-and-neural-regulation-amateur-half-marathon-r#comments Half-Marathon Human Study Mon, 15 Jan 2018 13:50:55 +0000 greenmedinfo 158401 at https://greenmedinfo.com Sports Med Open. 2016 Dec;2(1):21. Epub 2016 Mar 2. https://greenmedinfo.com/article/sports-med-open-2016-dec2121-epub-2016-mar-2 PMID:  Sports Med Open. 2016 Dec ;2(1):21. Epub 2016 Mar 2. PMID: 27747777 Abstract Title:  Acute Changes in Inflammatory Biomarker Levels in Recreational Runners Participating in a Marathon or Half-Marathon. Abstract:  BACKGROUND: Strenuous physical activity activates the participant&#039;s immune responses; however, few studies exist, observing exercise-induced simultaneous changes in mediators of inflammation.METHODS: We examined individual responses in soluble urokinase-type plasminogen activator receptor (suPAR), a marker of immune activation, soluble endocytic receptor for haptoglobin-hemoglobin complexes (CD163), a marker of monocyte-macrophage activation, C-reactive protein (CRP), and pro- and anti-inflammatory cytokines from blood samples drawn at baseline, at 3- and 48-h post-races from recreational runners who successfully completed the marathon (199 ± 8 min, n = 4) or half-marathon (132 ± 4 min, n = 4) run. For comparisons, biomarkers reflecting muscle, heart, kidney, and liver functions were measured.RESULTS: Significant 3-h post-race increases occurred in levels of suPAR (p <p><a href="https://greenmedinfo.com/article/sports-med-open-2016-dec2121-epub-2016-mar-2" target="_blank">read more</a></p> https://greenmedinfo.com/article/sports-med-open-2016-dec2121-epub-2016-mar-2#comments Half-Marathon Human Study Mon, 15 Jan 2018 02:05:37 +0000 greenmedinfo 158390 at https://greenmedinfo.com