another study that shows that High intensity interval training (HIT) results in fat loss. IN this study, training consisted of 20 minutes 3 x weekly for 12 weeks. Fat loss in total, abdominal, trunk, and visceral was decreased. This study only looked at men.
Exercise is key to healthy lifestyle: High Intensity Interval Training for Insulin resistance found to improve waist circumference, systolic bp, and HOMA-IR; Increased non-responders for insulin and glucose in those with mild IR versus severe IR.
Study finds sprint interval training increases PLIN 2 and PLIN 5 as in endurance training. PLIN2/5 are increased and play role in intramuscluar triglyceride breakdown. Increased IMTG is found in IR. This aids insulin resistance. Other studies have found that SIT increased PLIN5 > ET. Exercise impacts muscle and fat through epigenetics.
Endurance training increases GH more than resistance and sprints/short interval training. This increase in GH, though seen in all age groups, decreased in older aged men.
Study finds 2-4 resistance training episodes per week is optimal. Strength increased across the 3 time groups evaluated. The presence of inflammation is key in the interval between and # of workouts per week. Study found a point of plateau and diminishing returns.
rest interval between rest appears to play role in hormone response versus muscle growth response. Rest of 1 minute associated with more hormonal response versus rest of 5 minutes associated with more muscle growth response in men.
Decline in free Testosterone, especially in physically unfit men, blunted by oral 50 mg DHEA night before exercise. Total Testosterone and DHEA remained significantly low up to 24 hours post HIIT.