Strength training offers great benefits for health and physical performance, but it also carries certain risks if not practiced with proper technique and smart progression. Many people who lift weights can suffer overuse injuries in areas such as the shoulders, lower back, knees, and elbows, and even suffer muscle tears. Knowing the causes, how to prevent them, which exercises to avoid or modify, and how to properly rehabilitate is essential for safely resuming training and avoiding relapses.
Shoulder injuries: Rotator cuff tendonitis
What is it and what causes it?
Rotator cuff tendonitis is an inflammation of the tendons surrounding the shoulder joint. This injury develops with repetitive overhead movements, such as presses or deadlifts, especially when performed with poor technique or without a proper warm-up. Overuse can even lead to microtears or subacromial impingement syndrome, where the tendon is compressed between the acromion and the head of the humerus.
Precautions and recommendations
- Technique and load: Use moderate weights and maintain proper form with each repetition. Avoid sudden movements and overloading your shoulders with overhead exercises.
- Warm-up and activation: Perform specific warm-up exercises for your shoulder, such as internal and external rotations with elastic bands, and work on scapular stability with pulling exercises.
- Exercises to avoid: Military press, behind-the-neck pull-down, upright row, and bench dips.
- Modifications: You can replace the military press with variations such as the incline press or the landmine press, and perform controlled lateral raises without exceeding shoulder height.
- Rehabilitation: The initial phase includes relative rest, ice application, and, once the acute pain subsides, gentle mobility exercises and progressive strengthening of the rotator cuff through isometric and then isotonic contractions.
Low back injury: Overuse-related low back pain
What is it and what causes it?
Low back pain is one of the most common injuries during strength training. It's usually due to poor lifting technique (for example, deadlifts or squats) and a lack of core stability. Lifting excessive weights, making sudden movements, or having weakness in the abdominal and gluteal muscles can cause muscle strains or even contribute to the development of herniated discs.
Precautions and recommendations
- Lifting technique: Learn and apply the correct technique, lifting with your legs and keeping your back in a neutral position.
- Progression and load: Gradually increase the load to avoid sudden overexertion and accumulated fatigue.
- Core Strengthening: Incorporate strengthening exercises for the abdominals, obliques, glutes, and lumbar muscles to protect the spine.
- Exercises to avoid: Lower back hyperextensions, traditional full sit-ups, and straight leg raises, as these can put too much pressure on the lower spine.
- Modifications: Use machine-based alternatives like squat machines or presses that provide support and alternatives such as the front squat or using a hex bar for deadlifts.
- Rehabilitation: Initially, relative rest, ice application, and mobility exercises are recommended. Once pain is controlled, gentle isometric core exercises are started, progressing to dynamic contractions with low, progressive loads.
Knee Injury: Patellar Tendinitis (Jumper's Knee)
What is it and what causes it?
Patellar tendonitis is an inflammation of the tendon that connects the kneecap to the tibia. Commonly associated with repeated high-impact movements or intense loads such as squats, jumps, or lunges, the injury is due to cumulative overload and improper exercise execution. The pain is located just below the kneecap, and in advanced cases, it can make everyday activities such as climbing stairs difficult.
Precautions and recommendations
- Squat technique: Maintain good knee alignment and prevent it from collapsing inward during movement.
- Specific warm-up: Perform gentle cardiovascular exercises and joint mobility to warm up your knee.
- Strengthening: Intensely work the quadriceps, as well as the glutes and hamstrings to achieve muscular balance that relieves the load on the patellar tendon.
- Exercises to avoid: Jumping, deep squats with heavy weights, heavy knee extensions, and very pronounced lunges.
- Modifications: You can perform partial squats with control or isometric exercises such as the wall sit.
- Rehabilitation: The acute phase focuses on relative rest, ice application, and inflammation reduction. Eccentric quadriceps strengthening (e.g., slow squats) and gentle quadriceps stretching are then introduced, always progressing in a controlled manner.
Elbow injuries: Epicondylitis and triceps tendonitis
What is it and what causes it?
Elbow injuries, such as lateral epicondylitis (tennis elbow) or medial epicondylitis (golfer's elbow), and triceps tendonitis, result from overuse and repetitive movements that cause micro-tears in the tendons. These movements can be part of exercises like curls, pull-ups, or dips, which, if performed excessively or with incorrect technique, can overload the elbow area.
Precautions and recommendations
- Correct form and moderation: It's essential to use proper technique for each exercise and avoid overexerting your elbows. Alternate routines and allow adequate rest between workouts.
- Warm-up and stretching: Perform gentle elbow, wrist, and forearm movements before beginning your workout. Stretch your forearm muscles regularly to improve their flexibility.
- Exercises to avoid: Dips on parallel bars or bench presses with a very close grip, overhead triceps extensions, and heavy straight bar curls.
- Modifications: Use neutral grips (e.g., hammer curls or neutral-grip pull-ups) and use aids such as straps on pulling exercises to relieve elbow tension. You can also opt for higher-rep sets with lower loads to reduce tendon stress.
- Rehabilitation: Initially, it's necessary to stop exercising and apply ice. Then, physical therapy with eccentric and forearm strengthening exercises, along with isometric techniques, helps regenerate the tendons. Gradual reintroduction of activities is key to preventing relapse.
Muscle tears
What is it and what causes it?
Muscle tears occur when muscle fibers are partially or completely torn. They are usually caused by explosive exertion, overload, or a lack of warm-up, which causes the muscle to feel fatigued at the time of exertion. Common tears include those of the pectoral, hamstring, calf, or biceps muscles, and are characterized by sharp pain, a "pop" sensation, and sometimes bruising.
Precautions and recommendations
- Warm-up: Never skip a complete warm-up that includes cardiovascular activity and dynamic stretching of the muscle you are training.
- Progression in intensity: Increase the load and speed of your workout gradually. Overexerting your muscles without proper preparation increases the risk of muscle tears.
- Rest and recovery: It's essential to allow rest days between intense sessions and listen to your body's signals. Proper nutrition and rest are vital for muscle regeneration.
- Exercises to avoid: While the muscle is recovering, you should avoid intense exercises or explosive movements that could cause a new tear.
- Rehabilitation:
- Acute phase: Rest, application of ice and, in severe cases, medical attention.
- Subacute phase: Begin gentle mobility exercises and isometric contractions.
- Strengthening: As tissue integrity is restored, eccentric and progressive exercises are included, always avoiding intense pain, until returning to normal loads.
Conclusions and General Recommendations
Strength training is one of the most powerful tools for improving physical fitness and overall health, but its success depends largely on proper injury prevention and management. Some essential tips include:
- Listen to your body: Pain is a warning sign. If you experience persistent discomfort, it's best to stop and consult a specialist.
- Warm-up and technique: Never skip a proper warm-up or sacrifice technique to lift more weight. The quality of movement is more important than the amount of weight.
- Gradual progression: Gradually increase the load and volume of your training, allowing your muscles, tendons, and joints to adapt to the new demands.
- Comprehensive strengthening: Don't limit yourself to working the main muscle in each exercise. The stability and balance of the synergistic muscles (core, glutes, stabilizing muscles) are essential to prevent overload and injury.
- Rehabilitation and prevention: If you've suffered an injury, don't rush your recovery. Proper rehabilitation (including physical therapy, mobility, and strengthening exercises) is key to returning to training pain-free and avoiding relapse.
Ultimately, the key to training safely is a comprehensive approach that combines proper technique, warm-up, progression, and, in the event of an injury, well-structured rehabilitation. With these foundations in place, you can continue to enjoy the benefits of strength training while minimizing the risk of injuries that could jeopardize your long-term health.