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. Sprint interval ...
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Sprint interval training delivers major fitness gains in minimal time – here’s why it works
SIT may sound laid-back, but it’s anything but. Short for sprint interval training, it’s a form of high-intensity exercise that has nothing to do with taking a breather. ‘Sprint interval training is ...
HIIT, or high-intensity interval training, is increasingly popular, and it provides plenty of benefits, from torching calories to increasing your VO2 max and overall athletic performance. SIT, or ...
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