UPPER BODY HIIT
This type of circuit may be harder to perform for as long as the lower body circuit. The muscles in the upper body are smaller and therefore fatigue faster. It will be more beneficial to take the exercises slowly, maintaining good form. During the rest periods, include an array of corestrength exercises for an added bonus! Example set 5 x 20-30sec efforts with 20secs rest – press-ups, single-arm press/push, dips, chin-ups, TRX row.