You can take steps to prevent or alleviate post-workout muscle tremors.
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There are four primary reasons why your muscles shake after weight training - you're tired, your body is sore from holding or assuming the same position over a period of time, you have low blood sugar or you're dehydrated. While fitness experts agree that shaking muscles isn't necessarily dangerous, it can lead to injury. You can take steps to prevent your muscles from shaking or address the shaking once it starts happening.
Account for Fatigue
That shaking you feel in your muscles after a workout is normal; it signals that you engaged them while lifting weights. Working your muscles to the point of exhaustion is a double-edged sword, Keaira Lashae, a trainer for DailyBurn.com, told the Huffington Post. Work out too many days in a row and you can wear out your muscles. Resting between workouts or even between sets may help minimize the shaking, according to Loren G. Martin, a professor of physiology at Oklahoma State University. Tackling too tough of a workout can also cause your muscles to shake.
Hold That Contraction
Holding your arms or legs in the same position over an extended period of time can not only cause muscle fatigue, but it can also result in your muscles shaking. For example, extending your arms above your head while lifting weights can cause your arms to shake. These tremors, according to Brenda Lyttle, a health and fitness expert, should stop after you relax your muscles, such as when you lower your arms and put the weight down. You may also notice these tremors at the end of your workout. If your muscles shake during your workout, stop what you're doing. Cycling Coach Levi Bloom cautions against working out while your muscles shake. You can hurt yourself if you don't stop, he says, such as if your arms give out while you're doing a bench press or shoulder press.
Maintain Your Blood Sugar
Your body needs fuel to work, and the harder you work your muscles, the more fuel they need. The lower your blood sugar during and after your workout, the more likely your muscles are to shake, according to Lyttle. She recommends eating a small snack about 30 minutes before your workout. Once your muscles start to shake, either during or after your workout, eating a small snack should cause the shaking to stop in 20 to 25 minutes, she says.
Drink Your Water
Your muscles may shake after weight training if you're dehydrated. Blake Bissaillion, a power lifter and bodybuilder, recommends drinking two 8-ounce glasses of water before your workout and another three 8-ounce glasses of water during your workout. Shaking muscles can also indicate that your body is low on potassium and sodium. Bissaillion recommends eating a banana and drinking more water after your workout and supplementing this with an electrolyte drink 20 minutes after you finish.