Resistive Training Overview

Introduction

  • This chapter focuses on resistive training, its mechanisms, and the implications for athletes, strength and conditioning coaches, and overall physical training.
  • The chapter is research-based, and updates on new research are expected in future texts.
  • Understanding different types of resistive training can help athletes determine effective strategies for performance enhancement.

Types of Resistive Training Mechanisms

1. Muscular Power
  • Definition: Muscular power is characterized by fast, explosive movements performed at high speeds with lower weights.
  • Key Characteristics:
    • Movements are quick, not slow and controlled.
    • Not typically performed with a spotter due to their dynamic nature.
  • Examples of Power Movements:
    • Olympic lifting
    • Plyometrics
  • Importance: Most sports require explosive movements, and neglecting power training can hinder athletic performance.
2. Muscular Strength
  • Definition: Muscular strength focuses on lifting heavy weights at slow, controlled speeds.
  • Slow and controlled movements are essential for building strength effectively.
  • Key Concepts:
    • Force-Velocity Curve: Higher weights produce greater force when moved slowly.
    • Neural Adaptations:
    • Motor unit recruitment: An increased number of muscle fibers recruited leads to greater strength.
    • Synchronization of motor units also contributes to power generation.
  • Muscle Fiber Types:
    • Type 1: Slow-twitch fibers
    • Type 2A: Fast-twitch fibers
    • Type 2X: Most powerful fast-twitch fibers
  • Training Approach: It’s essential to enhance the ability to recruit type 2 fibers for strength gains.
3. Muscle Hypertrophy
  • Definition: Muscle hypertrophy is the enlargement of muscle fibers, a goal for many bodybuilders.
  • Training Volume: Requires higher repetitions (typically 3-6 sets of 6-12 reps) targeting the same muscle group across different exercises.
  • Calcium Release:
    • Calcium binds to troponin, affecting muscle contraction by exposing actin’s active sites for myosin binding.
  • Importance: Understanding muscle physiology helps trainers design effective programs for clients aiming to increase muscle size.
4. Muscle Endurance
  • Definition: Muscle endurance focuses on the ability to sustain prolonged exercise.
  • Characteristics:
    • Increased tolerance to lactic acid buildup, which occurs due to hydrogen ions accumulating in absence of oxygen during anaerobic activity.
  • Execution: Typically involves high repetitions (15-20 reps) with light weights to ensure sustainability.

Mechanical Work and Volume Load

  • Mechanical Work: Defined as force exerted over a distance (Force x Distance).
  • Volume Load: A practical measure of the total amount of weight lifted, calculated as total weight (e.g., 100-pound barbell lifted multiple times).
  • Training Load Considerations:
    • Arrangement of reps and sets affects intensity and quality of training.
    • The primary goal informs the appropriate set and rep structure alongside adequate rest intervals.

Training Load and Repetitions

Key Considerations for Program Design
  • Load is crucial for setting the structure of a lifting program;
    • Determine training goals (strength vs. power) to define appropriate weights and strategies.
  • One Repetition Maximum (1RM)
    • Definition: The maximum weight one can lift in a single rep, essential for calculating training loads for future workouts.
    • Percentage of 1RM guides the training program design, helping to structure load, reps, and recovery.
Calculation of 1RM
  • Understanding charts that relate 1RM to various rep ranges can aid in estimating training loads for different athletes, especially beginners.
  • Noting characteristics of athlete training levels—new versus experienced lifters—helps tailor the approach.

Force-Velocity Curve

  • Force vs. Velocity relationship:
    • High force correlates with low velocity (strength training).
    • Low force correlates with high velocity (power training).
  • Importance of understanding the curve
    • Strength gains require slow and heavy lifts, while power movements require lighter weights lifted explosively.

Volume Assignments Based on Training Goals

1. Strength/Power Training
  • Desired reps are typically below 6 with higher intensity (above 85% of 1RM).
  • Recommend rest periods of 2-5 minutes for recovery.
2. Hypertrophy Training
  • Higher rep ranges (6-12 reps) with moderate loads (70-80% of 1RM).
  • Rest periods of 30 seconds to 90 seconds are adequate.
3. Endurance Training
  • High repetition (15+ reps) with low weights.
  • Short rest intervals of about 30 seconds.

Program Development for Athletes

  • Introduced the principle of varying the training load throughout the week (heavy, light, medium days) to allow recovery and adaptation while preventing overtraining.
  • Discussed the two-for-two rule: increase the load when an athlete can perform two additional reps on the final set over two workouts.
  • Importance of knowing when and how much to increase weights based on training observation and performance.

Conclusion

  • A comprehensive understanding of resistive training mechanics, varying sets, reps, and recovery times are essential for effective programming. Coaches and athletes must consider individual goals, current fitness levels, and physiological responses to implement successful training regimens. This chapter serves as an essential guide to structuring practical training based on scientific principles.