Back-to-school season is nearing, and while your kids might be dreading homework and obeying their teachers' orders again, there's another surprise waiting in gym class. Trump is bringing back the ...

Jason Derulo works out twice a day, five to six days a week, he told Insider. His favorite exercises for his abs are L-sit pull-ups, weighted sit-ups, and seated rows, he said. Derulo intermittent ...

If you've ever wondered (mid-crunch, most likely) exactly how many sit ups you should be doing every day to optimise your fitness, then you're in the right place - this is exactly the type of question ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. It’s kind of strange, ...