Exercising your muscles and joints is a great way to build strength and improve the flexibility of your limbs. While exercising, you are likely to exert a high amount of energy through your muscles as you complete various physical movements. During your workout, you may also experience a level of muscle shaking as you begin to fatigue and lactic acid continues to build up in your muscles. This shaking is normal and should not be a reason for medical concern.
Fatigue
When you first begin a new exercise or weightlifting program, you are likely to have muscles that are not as toned as they will eventually become after numerous exercise sessions. Your muscles are likely to fatigue quickly when first working out as they are not yet accustomed to heavy lifting or long periods of exercise. This fatigue can include muscle shaking or muscle cramping.
Muscle Cramps
Another possible reason your muscles are shaking during exercise is because your muscle is currently experiencing a cramp. Muscle cramping often occurs in muscles that are saturated in lactic acid, which is produced during periods of heavy lifting or intense exercise. As this lactic acid builds to high levels inside a muscle group, your body will react by contracting the muscle strongly, resulting in a muscle cramp.
Prevention
You can prevent or lower the likelihood of muscle cramps and shaking during your workout by following a few simple exercise tips from the American Academy of Orthopaedic Surgeons. For example, stretching before and after exercise will help loosen your muscles and joints and help prevent the onset of muscle cramps, especially following your workout. Be sure to stay hydrated by drinking plenty of water during your exercise regimen to prevent cramping due to inadequate oxygen to your muscles, which is replenished through the water.
Rest
Rest is vitally important for anyone who is exercising on a regular basis as it can further lower your risk of injury, muscle shaking, or muscle cramping. Working out in intense heat or for a prolonged period can increase your muscle shaking and cramping over time. Taking time to relax and allow your muscles to regenerate will help lower this risk considerably.
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