The Science Behind 45 Minutes: Why Short, Intense Workouts Deliver Big Results

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When life feels busier than ever, especially during the holidays, finding time to work out can seem impossible. Between work deadlines, school events, and family gatherings, carving out an hour or more for the gym often falls to the bottom of the list. That is where F45’s 45-minute format comes in, offering a science-backed approach that delivers results without requiring endless time.

F45’s training system is built around efficiency. Each session combines strength, cardio, and functional movement to create a full-body workout that maximizes effort in less time. The real magic lies in the intensity. Research shows that short bursts of focused exercise can boost metabolism, increase endurance, and build lean muscle long after the workout ends. It is not about spending more time in the gym. It is about using that time wisely.

For many members, those 45 minutes become a reset button. It is a break from the noise of the day, a moment to focus fully on themselves before returning to everything else waiting outside the studio doors. The format fits easily into a lunch hour or before-school routine, allowing busy professionals and parents to stay consistent even during their most hectic weeks.

Tamra Gould, General Manager at F45, says the reason members stay so loyal is simple: the results speak for themselves. “So many times when I talk to our veteran members and ask what has kept them coming all these years, nine out of ten say it is the results,” she shares.

Those results often tell powerful, personal stories. One member reversed osteoporosis through strength training at F45. Another, Juan, used the workouts as the foundation to lose 60 pounds and rebuild his confidence. Tamra has seen how stories like these ripple through the studio, inspiring newer members to push harder and trust the process.

The 45-minute format also fits perfectly with the rhythm of the holiday season. When routines are unpredictable and schedules are packed, shorter workouts make it easier to stay on track. Each session is different, blending endurance, agility, and strength in new ways. The programming keeps members engaged while still challenging the body to adapt and grow. Every class brings a sense of excitement and accomplishment that keeps people coming back.

In just 45 minutes, members leave feeling grounded and proud. The energy in the studio builds with every set and every shout of encouragement. Coaches stay present, helping with form, motivation, and mindset. Small moments of progress—lifting a little heavier, moving a little faster, finishing one more rep—begin to add up.

The holidays can make it easy to lose momentum, but F45 proves that consistency does not require perfection. It is about showing up and giving your best in whatever time you have.

This season, carve out 45 minutes for yourself. The results will last far longer than the workout.

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Photos by Charlie Neuenschwander

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