I never thought I'd be buying shortie shorts and feeling good about it. But here I am with about six pairs of (let's for the sake of things call them) "yoga" shorts in my workout wear wardrobe. Since I bought them all at once I tried to save money and found them uber cheap on eBay. Of course, as you might expect they weren't of the highest quality.
I'm sure I'm not the only one who has suffered from the unbearable problem of spandex ride up. Yeah, I was the one constantly pulling at my thighs after a song, exposing 2-3 more inches of thigh that I would have rather kept hidden. If you know what I'm talking about you might want to use this simple technique to remedy that FOREVER! Seems to good too be true I know. But I did high knees, squats and kicks with no ride up to be seen.
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Step 1: Measure the inseam of your shorts from one leg to the other. Remember to stretch the shorts so they are the leg length you want them to be.
Step 2: Cut a piece of STIFFENED felt that length and four inches wide. It must be stiffened felt, like the kind bought at Michaels. Maybe that's a deal breaker for you. I tried regular felt with another pair of shorts and the test failed miserably! Maybe yours would work but mine didn't. It kind of feels like you have a pad down there;-P BUT, many times I don't wear underwear with these kinds of shorts because the panty lines are ridiculous so adding this was actually a kind of nice thing.
Step 3: Fold it in half lengthwise
Step 4: Pin the shorts to the inseam. I've found that it works best if you pin it in front of the crotch seam rather than centered or behind. But go ahead and experiment to see what works best for you. See next photo for a better example of what I'm describing.
Step 5: Sew to the hem of the shorts. See how the short's crotch seam is above my felt.
Step 6: Trim edges of felt into curves so they are not pointy.