You can’t talk Use this as a way to

[Annim jollix]

You can’t talk Use this as a way to raise interval intensity levels too Go hard enough so that you can’t talk for  minutes and  nucific bio x4 slow down so that you can chat for  minutes To burn the most fat and calories go as hard as you can for as long as you can Add Resistance Amplify your intervals by adding resistance to make them harder Holland suggests hill repeats — sprint up a hill and walks back down Do five reps....

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