Step 13: 2 Geared Motors and Wheels to Fit. It is very important that your motors have gears. You want a slow robot; Go for high ratios, like 120:1 or higher, as a slow robot is so much more fun in the beginning, because you can see what it is doing.
Applying Ice Correctly. Incorporate ice treatment 48 to 72 hours after youâve pulled your hamstrings. The National Health Service in England recommends wrapping the ice in a damp towel and applying it to the injured area for 15 to 20 minutes every two to three hours throughout the day.
Ice your back to reduce pain and swelling as soon as you injure yourself. Do it for 20-30 minutes every 3-4 hours for 2-3 days. You can also ice your back after physical activity. Apply heat to your back -- but only after 2-3 days of icing it first. Use heat on your back only after the initial swelling has gone down.