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Explosive moves with CrossFit and Tabata were key.
The hardcore workout of Jason Hairston.
No time, no gym, plenty of sweat.
According to a new study from the Mayo Clinic.
You think HIIT is hard? Wait 'til you try this.
The greatest moisture-wicking, chafe-free apparel.
Short, intense bursts of exercise are more enjoyable, study says.
Forget the treadmill for these high-intensity routines.