Workouts to boost performance on the court move the body in all directions, which also creates a balanced physique, Luke Worthington told Insider.

The influencer/supermodel sisters take different approaches to fitness, so I tried out both routines for a week to see which one I think is best.

Schwarzenegger trained for five hours a day as a professional bodybuilder in his younger years, he told Insider.

A reliable workout shirt should control odors, provide ample stretch, and stay comfortable no matter the exercise or activity. Here are our favorites.

Insider tracked down Portman's trainer, Naomi Pendergast, who gave us a detailed breakdown of the star's workout routine for the Marvel movie.

Davidsdottir said exercises such as the bird dog and curl up helped her recover after she had a herniated disc.

There are few situations where being completely immobile improves joint pain, Luke Worthington, a personal trainer, said.

Compression socks increase blood flow and provide relief for anyone who spends a lot of time on their feet. Here are the best ones we've tested.

Resistance bands are a versatile addition to any home gym, no matter if want to build muscle or rehab from an injury. Here are our favorites.

Build strength by working movements into your everyday life, such as while brushing your teeth or carrying groceries, trainer Nathalie Hayward said.

If you want to increase your daily protein intake, protein bars are an easy and delicious solution to do so. Here are our 5 favorites.

Drop your calories by no more than 15%, eat plenty of protein and fiber, and don't diet for too long, a PT and nutritionist told an Insider reader.

The Hyrox World Champion has a six-pack but told Insider he rarely trains abs. He advises people lift, walk, and eat well to build their own.

From boxing to weights, the supermodel sisters have different approaches to fitness, so I tried both of their workout routines to see which I prefer.

The "Thor" star posted a video on Instagram of him performing the full body circuit including burpees, V-sits and jump lunges.

I spent 7 days each doing a Kim Kardashian-inspired fitness routine and a Khloe Kardashian-style routine to see which sister has the best moves.

Robinson Canó said that training with A-Rod kept him in shape for a full 162-game season, helping the Yankees win the World Series in 2009.

I didn't feel like I was using my abs during the class, but gymnastics engages every core muscle, like the obliques. I felt the burn for a week.

Steve Weatherford said he squatted with heavy weights for years and developed arthritis. He switched to lunges for lower-body gains without pain.

Peloton is an at-home fitness giant but you don't need to own its stationary bike to have access to the brand's extensive library of workout classes.