FITBOOK author Nina Ponath loves challenges—this time: 10 days of jumping jacks. Photo: Getty Images / Antonio_Diaz; Collage: FITBOOK Jumping jacks in all variations–FITBOOK author Nina Ponath did at ...
Jumping jacks in all variations—FITBOOK author Nina Ponath did at least 200 of them every day for 10 days. Here, she shares how it made her heart leap and why she almost gave up. Most of us remember ...
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