Instead: Invest in a new pair of kicks, because worn-out soles are a quick path to injury. Write the purchase date on the tongue or side of your shoes and let your weekly mileage be your guide. If you walk or run 10 miles per week, replace your shoes every 12 months; 15 miles, every 8 months; 20 miles, every 6 months; 30 miles, every 4 months.
Instead: Spend $20 to $25 for a better-quality one. A study in the British Journal of Sports Medicine tested nearly 1,000 low-end pedometers and found almost three-quarters of them were inaccuratewith most of them overestimating step counts.
Instead: Use heavier weights that challenge you, says Tim Davis, director of personal training at Peak Performance in New York. Your body has an amazing ability to adapt quickly, so if you dont regularly increase the weight youre lifting, youll eventually plateau. Lift as much as you can, as long as it isnt painful and you feel in control throughout the move.