Commitment like this needs to be done by someone with body CRF conditioned to intense interval training. Not to be entered into by a novice as injury will likely occur (more resting time needed for muscle groups for beginners).

Commitment like this needs to be done by someone with body CRF conditioned to intense interval training. Not to be entered into by a novice as injury will likely occur (more resting time needed for muscle groups for beginners).

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