Imagine a workout that burns fat and potently boosts your speed and agility. Sprint interval training (SIT) is a workout ...
Treadmill HIIT workouts boost metabolism, improve heart health and help you lose weight. Try these low-impact high intensity ...
Intervals 1 to 4 (12 minutes total): Walk for 2 minutes on 2% to 5% incline at a pace that is easy for you (somewhere between ...
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