Without a variable workout, exercise quickly becomes nothing more than a Sisyphean routine of lifting boulders, running up hills, and running away from sudden boulder avalanches. Run toward a safer fitness routine with today's Groupon: for $20, you get a one-month fitness-center membership to YWCA Tulsa (up to a $70 value). This Groupon is valid at the East and Midtown locations. Today's deal is valid for any one of the following types of membership:

• Student membership (a $22 value at East, a $35 value at Midtown)
• Adult membership (a $35 value at East, a $49 value at Midtown)
• Single-parent family membership (a $46 value at East, a $59 value at Midtown)
• Family membership (a $58 value at East, a $70 value at Midtown)
• Senior membership (a $29 value at East, a $42 value at Midtown)
• Senior family membership (a $52 value at East, a $65 value at Midtown)

YWCA Tulsa furnishes physical-fitness centers at two separate locations for exercisers of all ages. Both locations boast a heated indoor pool and kiddie pool, strength-training and cardio equipment, and group-fitness and aquatic-exercise classes. The East location's bright, spacious, carpeted aerobics room helps exercisers perfect techniques with wall-size mirrors. Yoga and core dynamics classes gather together flex-focused student bodies, and solo body modifiers spread out across an array of free weights, weight machines, and treadmills. Televisions hang above the treadmills to entertain those running in place at Midtown, and the location's capacious, wood-floored aerobics studio hosts group spin, yoga, Pilates, and Zumba classes. Midtown's drop-in childcare allows parents to unload their youngsters while taking a break to hit the gym, take a yoga class, or go for a jog in the pool.