Glucose response to exercise in the post ‐prandial period is independent of exercise intensity

This study investigated the acute glucose response to low‐intensity, moderate‐intensity, and high‐intensity interval exercise compared to no‐exercise in healthy insufficiently active males using a four‐arm, randomised, crossover design. Ten males (age: 37.3±7.3 years, BMI: 29.3±6.5 kg·m−2) completed four 30 minute interventions at weekly intervals comprising low‐intensity exercise (LIE) at ~35% VO2R, moderate‐intensity exercise (MIE) at ~50% VO2R, high‐intensity interval exercise (HIIE) at ~80% VO2R, and a no‐exercise control. Participants performed cycle ergometer exercise 30 minutes after finishing breakfast. Glucose response was assessed using a continuous glucose monitor under free‐living conditions with dietary intake replicated. A significant effect for intensity on energy expenditure was identified (p<0.001) with similar energy cost in MIE (mean±SD: 869±148 kJ) and HIIE (806±145 kJ), which were both greater than LIE (633±129 kJ). The pattern of glucose response between the interventions over time was different (p=0.02). Glucose was lower 25 minutes into each of the HIIE, MIE and LIE trials respectively (mean difference±SD: ‐0.7±1.1; ‐0.9±1.1; ‐0.6±0.9 mmol·L−1; p<0.05) than in the no‐exercise trial, but was not different between exercise intensities (p>0.05). Twenty‐four hour AUC was not affected by exercise intensity (p=0.75). There was a significant effect for exercise enjoyment (p=0.02), with LIE (69±4) preferr...
Source: Scandinavian Journal of Medicine and Science in Sports - Category: Sports Medicine Authors: Tags: Original Article Source Type: research