As the director of the women’s-only group strength training series at The Movement Minneapolis – a small, inconspicuous gym tucked between a pharmacy and a dry cleaner’s – Jen Sinkler strives to create a safe and supportive environment where clients can enjoy fitness. But that doesn’t mean clients shouldn’t expect to work hard.

Every hour-long class begins with a dynamic warm-up and ends with a quick, ten-minute finisher Sinkler describes as “lifting weights