Gym shorts can ride up when movement, fabric tension, garment length and fit repeatedly pull the leg opening upward. Choosing the right size, stretch, waistband and short length can reduce unwanted movement, but no pair can guarantee zero riding up for every body or exercise. At Avvini Athletica, we focus on helping you find activewear that works with your training—not against it.
If you spend half your session pulling your shorts back into place, it is worth looking beyond the simple assumption that they are “too small.” Several parts of the garment—and the movements you perform—can affect where your shorts settle.
Why Do Gym Shorts Ride Up During Workouts?
Your body changes shape constantly during training. Your hips flex, your glutes and thighs move, and the fabric stretches and relaxes with every squat, stride and lunge. When the forces acting on a pair of shorts repeatedly draw fabric toward the hip crease or upper thigh, the leg opening can migrate upward.
1. The Shorts May Be Too Tight
Sizing down is sometimes treated as a shortcut to a more compressive fit, but tighter is not always more secure. If fabric is under excessive tension around the thighs or hips, movement can encourage it to shift. Look for a fit that feels close and supportive without restricting your natural range of motion.
2. The Shorts May Be Too Loose
If shorts are too loose around the waist, hips or leg openings, they may lack enough stability to maintain their intended position as you move. A secure fit should follow your body without feeling either excessively stretched or noticeably slack.
3. Shorter Lengths Naturally Have Less Fabric on the Thigh
A shorter silhouette leaves less fabric extending down the thigh. Depending on your body shape and movements, that may mean you notice more movement around the leg opening during deep squats, running or high-knee exercises. If you consistently prefer more thigh coverage, a longer bike-short silhouette may feel more comfortable.
Our coverage pick: Luna Scrunch Bum Bike Shorts provide a longer silhouette than our shorter Luna and Vital styles, with four-way stretch and dual side pockets designed for a standard smartphone.
4. Fabric Stretch Changes How Shorts Move
Four-way stretch allows material to extend both across and along the garment. This can help shorts accommodate movements such as squats, lunges and hip hinges. Fabric recovery matters too: after stretching, the garment needs to return toward its intended shape.
5. Your Waistband and Lower Fit Work Together
It is easy to focus only on the leg openings, but the waistband is another important part of overall garment stability. A secure high-rise waistband can help the shorts feel anchored through movement. However, the entire garment needs to fit cohesively.
6. The Exercise Itself Makes a Difference
Shorts that barely move during strength exercises may behave differently during running or HIIT. Running repeatedly flexes the hip and cycles the leg forward. HIIT can combine high knees, jumps, burpees and lateral movement. Leg day involves deep hip flexion through squats and lunges.
How to Test Gym Shorts Before Your Workout?
Do not stop at standing in front of the mirror. Perform several slow bodyweight squats, alternating lunges, a hip hinge and a few high-knee movements. Pay attention to the waistband, crotch and leg openings. Some garment movement is normal; the question is whether the shorts settle comfortably or require repeated manual adjustment.
Would Longer Bike Shorts Help?
They can be worth trying if your main concern is thigh coverage. Longer bike shorts extend farther down the leg, so some women prefer them for running, high-intensity sessions and everyday movement. They are also useful when you simply feel more confident with additional coverage.
What About Adjustable Shorts?
Adjustable details can give you more control over the look and length of a pair. Luna Scrunch Bum Shorts feature adjustable side ties that can create a shorter, more ruched side silhouette. Set them before training and test the shorts through your normal movements so you know how that configuration feels in motion.
How to Choose Gym Shorts That Feel More Secure
Start with the recommended size instead of automatically sizing down. Look for flexible stretch that supports your normal range of motion. Consider whether a shorter or longer silhouette suits your preferred coverage. Assess the waistband together with the hip and thigh fit. Then test the shorts using the exercises you actually perform.
If squat-proof coverage is your priority, Vital Scrunch Bum Shorts are the Avvini option with an explicit squat-proof product claim, alongside four-way stretch and a high-compression V-shaped waistband.
The Best Fit Is the One You Can Train In
A better pair of gym shorts should help you spend less time thinking about your clothes and more time moving with confidence. Fit is personal, and body shape, training style and coverage preferences all influence how shorts behave.
Explore our scrunch bum shorts to compare Luna, Vital and the longer Luna Bike silhouette, or browse our women’s shorts collection to find the fit that works for your training.