Renew Fitness USA

Did you Know?

Zone 5: Red line zone (90–100% of HRmax). Training in this zone burns the most calories, but the lowest percentage of fat. Only the most physically fit exercisers should spend any time training in this zone. Exercisers who utilize this zone usually do so for brief periods, as part of an interval training regimen. This zone feels like gasping. You're really uncomfortable and it will feel incredibly difficult.

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