PURPOSE: This study aimed to investigate the effects of a single session of sprint interval training (SIT) and a single extended sprint (ES), matched for total work, on metabolic health biomarkers. METHODS:Ten overweight/obese men aged 26.9±6.2years participated. Following a pre-trial incremental exercise test and SIT familiarization, each participant undertook three 2-day trials in randomized order. On Day 1 participants either undertook no exercise (CON), four maximal 30-s sprints, with 4.5min recovery between each (SIT), or a single maximal extended sprint (ES) matched with SIT for work done. On Day 2, participants had a fasting blood sample taken, undertook an oral glucose tolerance test to determine insulin sensitivity index (ISI), and had blood pressure measured. RESULTS: Total work done during exercise did not differ between SIT and ES (61.7±2.9 vs. 61.3±2.8kJ; p=0.741). Mean power was higher in SIT than ES (518±21 vs. 306±16W, p<0.0005), resulting in a shorter high-intensity exercise duration in SIT (120±0 vs. 198±10s, p<0.0005). ISI was 44.6% higher following ES than CON (9.4±2.1 vs. 6.5±1.3; p=0.022), but did not differ significantly between SIT and CON (6.6±0.9 vs. 6.5±1.3; p=0.208). However, on the day following exercise fat oxidation in the fasted state was increased by 63% and 38%, compared to CON, in SIT and ES, respectively (p<0.05 for both), with a concomitant reduction in carbohydrate oxidation (p<0.05). CONCLUSION: A single ES, which may represent a more time-efficient alternative to SIT, can increase insulin sensitivity and increase fat oxidation in overweight overweight/obese sedentary men.
RCT Entities:
PURPOSE: This study aimed to investigate the effects of a single session of sprint interval training (SIT) and a single extended sprint (ES), matched for total work, on metabolic health biomarkers. METHODS: Ten overweight/obesemen aged 26.9±6.2years participated. Following a pre-trial incremental exercise test and SIT familiarization, each participant undertook three 2-day trials in randomized order. On Day 1 participants either undertook no exercise (CON), four maximal 30-s sprints, with 4.5min recovery between each (SIT), or a single maximal extended sprint (ES) matched with SIT for work done. On Day 2, participants had a fasting blood sample taken, undertook an oral glucose tolerance test to determine insulin sensitivity index (ISI), and had blood pressure measured. RESULTS: Total work done during exercise did not differ between SIT and ES (61.7±2.9 vs. 61.3±2.8kJ; p=0.741). Mean power was higher in SIT than ES (518±21 vs. 306±16W, p<0.0005), resulting in a shorter high-intensity exercise duration in SIT (120±0 vs. 198±10s, p<0.0005). ISI was 44.6% higher following ES than CON (9.4±2.1 vs. 6.5±1.3; p=0.022), but did not differ significantly between SIT and CON (6.6±0.9 vs. 6.5±1.3; p=0.208). However, on the day following exercise fat oxidation in the fasted state was increased by 63% and 38%, compared to CON, in SIT and ES, respectively (p<0.05 for both), with a concomitant reduction in carbohydrate oxidation (p<0.05). CONCLUSION: A single ES, which may represent a more time-efficient alternative to SIT, can increase insulin sensitivity and increase fat oxidation in overweight overweight/obese sedentary men.
Authors: Erik A Willis; Amanda N Szabo-Reed; Lauren T Ptomey; Jeffery J Honas; Felicia L Steger; Richard A Washburn; Joseph E Donnelly Journal: J Phys Act Health Date: 2019-05-19
Authors: Ricardo Borges Viana; Claudio Andre Barbosa de Lira; João Pedro Araújo Naves; Victor Silveira Coswig; Fabrício Boscolo Del Vecchio; Rodrigo Ramirez-Campillo; Carlos Alexandre Vieira; Paulo Gentil Journal: Sports Med Date: 2018-09 Impact factor: 11.136
Authors: Bert Bond; Craig A Williams; Carly Isic; Sarah R Jackman; Keith Tolfrey; Laura A Barrett; Alan R Barker Journal: Eur J Appl Physiol Date: 2014-12-11 Impact factor: 3.078
Authors: Ammar W Ashor; Jose Lara; Mario Siervo; Carlos Celis-Morales; Clio Oggioni; Djordje G Jakovljevic; John C Mathers Journal: Sports Med Date: 2015-02 Impact factor: 11.136
Authors: Itamar Levinger; Christopher S Shaw; Nigel K Stepto; Samantha Cassar; Andrew J McAinch; Craig Cheetham; Andrew J Maiorana Journal: Clin Med Insights Cardiol Date: 2015-06-25