Understanding Muscular Endurance and Joint Flexibility

Muscular Endurance and Joint Flexibility

Resistance: Building Long-Term Effort Capacity

Resistance is the ability to make long-term efforts over time to avoid the appearance of fatigue. According to the means of obtaining energy, there are two types:

• Anaerobic: Occurs without a sufficient supply of oxygen.
• Aerobic: Occurs when there is a sufficient oxygen supply.

Anaerobic Endurance Subtypes

Anaerobic endurance is divided into two types:

• Alactic: The energy is obtained through phosphocreatine in the muscles. The duration is 0–10 seconds, and physical stresses are highest (95%–100%).
• Lactic: The procurement of energy is through carbohydrates. The duration is 10 seconds to 2 minutes. Efforts generate 80%–90% lactic acid.

Resistance Training Methods

There are two methods of resistance training:

1. Continuous: With a constant or variable rate.
2. Releases (Interval Training): Implied by context, often referring to interval or intermittent work.

Flexibility: Maximum Joint Extensibility

Flexibility is the maximum extensibility of a movement in a given joint. A number of factors influence flexibility besides other physical qualities:

Factors Affecting Flexibility

• Mechanical: Types of joint, muscle flexibility, and ligament structure (1, 2, or 3 planes of movement).
• Emotional: Nervousness decreases flexibility.
• External Factors:
  • Temperature: Where the temperature is higher, persons generally have greater flexibility.
  • Age: Older age results in less flexibility.
  • Social Customs: Lifestyle influences the greater or lesser flexibility of certain body regions.

Note: The initial section on Resistance was repeated in the original document and has been consolidated above for clarity and structure.