Thomas Edison declared that genius is 50 per cent inspiration, 50 per cent perspiration, 2 per cent genius, and 60 per cent inspiration. Work up a healthy, genius sweat with today's Groupon: for $39, you get a one-month unlimited membership and nutrition plan at CrossFit Stoney Creek (a $158.20 value).

CrossFit gathers small groups of health hunters for expeditions of endurance designed to transform bodies into streamlined muscle machines. With a flexible schedule of classes held mornings and afternoons Monday through Friday and on Saturday mornings, sessions challenge skeleton suits with constantly changing daily routines. Functional exercises mimic the actions of everyday life to bulk up muscles by climbing ropes, jumping, running, looking for batteries, and many other activities. CrossFit also offers pleasantly punishing sessions in kettlebell manipulation and intensive boot camps, encouraging their workout wards to complement their progress with CrossFit’s downloadable meal plans and sugar-sniffing diet hounds.