Shown from left to right:
Camelbak Water Bottle
Tired of flooded gym bags? This sipping valve prevents drips, even when the bottle is upside down. Just flip the mouthpiece, bite down, and sip. The integrated handle makes it easy to carry the bottle or clip it onto a bag.
To buy: $15, camelbak.com.
Here's everything you need for strength training in one package, small enough to store under a bed. Simply pull the knobs to slide on the metal plates, which increase the weight in 2½-pound increments (topping out at 12.5 pounds per dumbbell).
To buy: $70, target.com.
You can't really walk around tethered to a heating pad, but these disposable self-heating wraps soothe sore muscles equally well. Sized for the neck, knees, arms, back, and belly, they last for up to eight hours and stay put with Velcro or adhesive.
To buy: $7 at drugstores.
i|m Flexhold Shoelaces
No more stopping midworkout to retie shoelaces. Rubber treads woven throughout keep these laces tightly bound together, and the reflective thread offers extra nighttime visibility for outdoor exercisers.
To buy: $6, studioim.com (look for Real Simple in the “as seen in” section).
Yoga is hardly soothing when sweaty palms make you fall flat on your face, but these fingerless gloves will help keep you steady. They're made of nonslip nylon and polyvinyl, with perforated holes so sweat can escape.
To buy: $25, yogasyz.com.