Muscle and Blood Metabolites during a Soccer Game

Abstract

Sprint performance is reduced both temporarily during a game and at the end of a soccer game. The latter finding may be explained by low glycogen levels in individual muscle fibers. Blood lactate is a poor indicator of muscle lactate during soccer match play.

Effect of Fat and CHO Meals on Intermittent Exercise in Soccer Players

“…Furthermore, fat metabolite responses are in accordance with previous research; with signifi cant increases in FA [ 21 , 22 , 28 ] , glycerol [ 21 , 22 ] and β-hydroxybutyrate [ 21 ] after the ingestion of a HFM and during subsequent exercise performance. The observations of FA are consistent with others who report increases over the 90 min of match play, irrespective of the preexercise nutritional strategies employed [ 15 ] . Meals that are high in CHO suppress plasma FA concentrations [ 28 ] , which may be the case since the HFM contained 59.4 g of CHO compared to 160 g with the HCM.…”

“…Similarly previous research [ 25 ] found a signifi cant reduction in muscle glycogen after 90 min of match play, and observed that distance covered was reduced for players expressing lower levels of muscle glycogen compared to those with higher levels. More recently, authors [ 15 ] investigated muscle glycogen levels pre and post match, and observed a decrease (449 ± 23-255 ± 22 mmol . kg − 1 d. w.) in overall muscle glycogen levels and found that 47 % of the muscle fi bres were completely or almost empty of glycogen after the match.…”

Salbutamol effects on systemic potassium dynamics during and following intense continuous and intermittent exercise

“…This is the first report of arterial [K + ] during HI int , comprising brief sprints repeated in bursts to simulate intense activity undertaken in many team sports (Bishop et al 2011 (Krustrup et al 2006;Wylie et al 2013;Mohr et al 2011;Mohr et al 2007;Duffield and Marino 2007;Mohr et al 2006;Struthers et al 1988). …”

“…The antecubital venous [K + ] reported during intense intermittent exercise varies, reaching 4.3 mM during squash (Struthers et al 1988), 5.1 mM during soccer (Krustrup et al 2006), and 5.5-6 mM during repeated intermittent sprint testing (Wylie et al 2013;Mohr et al 2011;Mohr et al 2007;Duffield and Marino 2007;Mohr et al 2006 O 2 peak for use on the same cycle ergometer in the subsequent experimental trials. All respiratory measurements were as previously described (Atanasovska et al 2014) .…”

Dietary nitrate supplementation improves sprint and high-intensity intermittent running performance

“…Since this pattern of high-intensity intermittent exercise is associated with significant type II muscle recruitment (Krustrup et al 2006) and, since NO 3 -supplementation can enhance physiological processes in type II muscle (Hernandez et al 2012;Ferguson et al 2013), NO 3 -supplementation has the potential to enhance team-sportspecific high-intensity intermittent exercise performance. Consuming a very large NO 3 -dose (29 mmol) over 36 hours prior to exercise was shown to improve performance during the YoYo intermittent recovery level 1 test (Yo-Yo IR1; Wylie et al 2013a), a well-established and ecologically valid test widely used to mimic the high-intensity running bouts of football match-play (Bangsbo et al 2008).…”