I added one kettlebell exercise to every workout for a month — and it quietly became my favorite move
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A 38-year-old fitness founder shares 2 habits she uses to build muscle
Morgan Kline cofounded Burn Boot Camp with her husband, Devan Kline, in 2012. Kline attends Burn Boot Camp…
Zoe Saldaña swapped Pilates for weights at 48
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