Top YouTube Fitness Influencers’ Most Popular Workout Videos
Your Favourite YouTube Fitness Influencers' Most Popular Workout Videos
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Keep your water and towel close by — Karena Dawn and Katrina Scott, trainers and cofounders of Tone It Up, are making sure their workouts live up to their YouTube channel's name. With 3.4 million views, it seems that this dumbbell circuit delivers on the full-body workout promised.