Strength training

Overview of Treatment

Muscle strength training is a form of exercise primarily aimed at increasing muscle power, improving muscular endurance, and enhancing overall body function. Through systematic practice using weights or resistance devices, it promotes muscle fiber growth, strengthens bone density, and improves metabolic functions. This therapy is commonly applied in rehabilitation medicine, injury prevention in sports, and chronic disease management. Its core principle involves stimulating moderate muscle damage to trigger repair mechanisms, thereby thickening muscle fibers and enhancing neuromuscular coordination.

Types and Mechanisms of Treatment

Muscle strength training can be divided into two main types: "maximal strength training" and "muscular endurance training." The former involves heavier loads with fewer repetitions (e.g., squats and deadlifts), primarily stimulating fast-twitch muscle fibers; the latter involves moderate to low loads with higher repetitions (e.g., dumbbell curls), aiming to enhance the endurance of slow-twitch fibers. Its physiological mechanisms include:

  • Promoting growth hormone secretion, inducing muscle protein synthesis
  • Increasing cross-sectional area of muscle fibers
  • Enhancing the adaptability of tendons, ligaments, and bones

Indications

Suitable for the following medical conditions:

  • Rehabilitation from sports injuries (e.g., muscle strengthening after ligament tears)
  • Secondary prevention of osteoporosis
  • Risk regulation of metabolic syndrome
  • Fall risk reduction training for the elderly

Usage and Dosage

The basic principle is 2-4 sessions per week, each lasting 60-90 minutes, with alternating muscle groups. Load intensity is recommended at 60-80% of 1-RM (one-repetition maximum). Beginners can start with bodyweight exercises. Advanced training may include:

  • Overload recovery cycles: increasing load by 5-10% every 4 weeks
  • Prioritizing compound movements (e.g., squats, deadlifts)
  • Focusing on proper form over load

Benefits and Advantages

Main therapeutic effects include:

  • Increase in basal metabolic rate by 10-15%
  • Bone density increase by 1.5-3% (according to WHO standards)
  • Reduction in glycated hemoglobin by 0.5-1.0%

Clinical studies show that six months of continuous training can reduce fall risk by 40% and significantly improve pain scores in patients with chronic back pain. Additionally, its effect on enhancing insulin sensitivity has been confirmed by multiple studies, making it suitable as a non-pharmacological treatment for prediabetic patients.

Risks and Side Effects

Main potential risks include:

  • Overuse joint injuries (e.g., shoulder injuries)
  • Metabolic acidosis risk (for high-intensity trainers)
  • Transient blood pressure elevation (may exceed 180/100 mmHg during training)

Special Attention: Incorrect posture may lead to disc herniation; it is recommended to perform exercises under the guidance of a professional coach. Hypertensive patients should avoid the Valsalva maneuver during training to reduce cardiovascular risks.

Precautions and Contraindications

Contraindications include:

  • Within 3 months after acute myocardial infarction
  • Uncontrolled hypertension (systolic BP >180 mmHg)
  • Pregnant women in the third trimester

Special populations should adjust their programs:

  • Elderly over 65 should reduce load to 40-50% of 1-RM
  • Diabetic patients should train 1 hour after meals
  • Patients with heart disease should monitor heart rate (target HR = 60-70% of maximum heart rate)

Interactions with Other Treatments

Interactions with medication include:

  • Increased protein intake when using corticosteroids
  • Beta-blockers may affect metabolic responses during training
  • NSAIDs may delay muscle recovery post-exercise

Recommended integrated physical therapy approaches:

  • Combining electrical stimulation training to enhance neuromuscular adaptation
  • Pairing with aquatic aerobic exercises to reduce joint impact
  • Synchronizing with nutritional supplementation to enhance effects

Therapeutic Effects and Evidence

According to Cochrane reviews, muscle strength training can increase bone mineral density by 2.3% within 6 months (95% CI 1.8-2.8%). For type 2 diabetes patients, a 12-week program can reduce HbA1c by an average of 0.6%. The World Health Organization recommends that people over 65 perform resistance training at least twice weekly.

Clinical trials confirm that programs combining core training can reduce medication needs in chronic lower back pain patients by 40%. Exercise physiology research indicates that progressive overload training can increase lean body mass by 2.5-4 kg and improve lipid profiles (LDL/HDL ratio decreases by 15-20%).

Alternative Options

If traditional muscle strength training is not feasible, the following alternatives can be considered:

  • Water-based muscle strength training: uses water resistance to reduce joint stress
  • Resistance band training: portable resistance system
  • Bodyweight exercises (e.g., push-ups, squats)

Supplementary alternatives include:

  • Electrical stimulation muscle training devices
  • Functional training (e.g., balance boards combined with resistance)
  • Qigong or Tai Chi resistance movements

These alternatives should be tailored to the patient's physical condition. For example, those with poor cardiopulmonary function may prioritize water training, while arthritis patients may prefer low-impact resistance band systems.

 

Frequently Asked Questions

What physical preparations are needed before starting strength training?

It is recommended to undergo a professional coach's movement assessment before starting strength training to confirm joint flexibility and muscle balance. Warm-up exercises of at least 10 minutes, including dynamic stretching and light aerobic activity, are advised to increase muscle temperature and reduce injury risk. Patients with chronic illnesses should consult a doctor beforehand and adjust training intensity accordingly.

Should I stop training if I experience muscle soreness after strength training?

Minor muscle soreness (DOMS) is normal and usually subsides within 24-72 hours after training. There is no need to stop training. However, if pain is accompanied by swelling, severe pain, or joint discomfort, training should be immediately halted and evaluated by a professional to rule out muscle strains or ligament injuries.

How can diet be combined to enhance the effects of strength training?

Consuming high-quality protein (e.g., yogurt, chicken breast) and complex carbohydrates (e.g., oats, whole grains) within 30 minutes post-exercise can promote muscle repair and growth. The daily protein intake should be 1.2-2 grams per kilogram of body weight, along with adequate vitamin D and calcium intake to support bone and muscle health.

How should strength training be scheduled relative to cardiovascular training?

It is recommended to perform strength and cardiovascular training separately to avoid excessive fatigue from high-intensity combined workouts. If performed on the same day, do strength training first, then rest for 30 minutes before aerobic exercise. It is advisable to alternate training different muscle groups on different days and ensure at least one full rest day per week for recovery.

What are the risks and precautions for elderly individuals performing strength training?

Older adults should choose low-impact exercises (e.g., resistance bands, free weights) and start with low intensity to adapt gradually. Training 2-3 times per week focusing on muscular endurance rather than maximum strength is recommended. Monitoring blood pressure during exercise is important, and those with heart disease or osteoporosis should consult a doctor to adjust movements accordingly.