Athleticism is more than dodging projectiles, wrangling mascots, and dropkicking a computer after it beats you in chess. Outfit yourself for adventure with today's Groupon: for $19, you get $40 worth of sporting goods at Peter Glenn Ski & Sports on Galleria Parkway or Roswell Road.

Peter Glenn stocks its shelves with a wealth of sporting equipment and apparel for tennis, skiing, snowboarding, and water skiing. Brands such as Alpinestar, Wilson, Prince, K-Swiss, and Head line the walls of both Atlanta locations, waiting to slip over heads, armor shoulders and feet, and comfort whining tennis elbows. Tail and K-Swiss tennis garments distract opponents with bright colors and sleek designs ($35+), and a re-strung racket ($18) and new tennis balls ($2.99+) let the seed of a powerful forehand flower into beautiful aces. Springing flashily out of their boxes and leather jackets, tennis shoes ($59.99+) and rackets ($79.99+) intimidate opponents with their frightening utility and charm referees with their roguish good looks.

Peter Glenn also outfits summer boaters in deck-side apparel and safety equipment, adorning water-skiers in board shorts ($45+) and O'Brien nylon life vests that protect bodies from senseless super-soaker attacks ($30+).