Inactivity Causes Resistance to Improvements in Metabolism After Exercise.

Prolonged sitting prevents a 1-h bout of running from improving fat oxidation and reducing plasma triglycerides. This "exercise resistance" can be prevented by taking 8500 steps·d-1 or by interrupting 8 h of sitting with hourly cycle sprints. We hypothesize that there is an interplay between background physical activity (e.

Background Inactivity Blunts Metabolic Adaptations to Intense Short-Term Training.

Purpose: This study determined if the level of background physical inactivity (steps per day) influences the acute and short-term adaptations to intense aerobic training.

Methods: Sixteen untrained participants (23.6 ± 1.

Physiological responses to maximal 4 s sprint interval cycling using inertial loading: the influence of inter-sprint recovery duration.

Purpose: Interval exercise allows very high-power outputs to be maintained, a key for stimulating training adaptations. The main purpose of this study was to develop a sprint interval protocol that stimulated both anaerobic and aerobic systems while maximizing power output and minimizing fatigue. The secondary goal was to investigate the influence of inter-sprint recovery duration.

Daily Step Count and Postprandial Fat Metabolism.

Introduction: Two benefits of acute exercise are the next day's lowering of the postprandial plasma triglyceride response to a high-fat meal and increased fat oxidation. However, if activity levels (daily steps) are very low, these acute adaptations to exercise do not occur. This phenomenon has been termed "exercise resistance.

Differences in joint power distribution in high and low lactate threshold cyclists.

Purpose: The biomechanical differences between cyclists with a high compared with a low blood lactate threshold (HLT; 80% VO vs LLT, 70% VO) have yet to be completely described. We hypothesize that HLT cyclists reduce the stress placed on the knee extensor muscles by increasing the relative contribution from the hip joint during high-intensity cycling.

Method: Sixteen well-trained endurance athletes, with equally high VO while cycling and running completed submaximal tests during incremental exercise to identify lactate threshold ([Formula: see text]) while running and cycling.

Hourly 4-s Sprints Prevent Impairment of Postprandial Fat Metabolism from Inactivity.

Unlabelled: High postprandial plasma lipids (PPL; i.e., triglycerides) are a risk factor for cardiovascular disease.