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Exercise and Muscle Performance01:27

Exercise and Muscle Performance

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Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
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Muscle Stimulation Frequency01:22

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
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Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
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Introduction
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Related Experiment Video

Updated: Mar 3, 2026

Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
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Practicing the Test Produces Strength Equivalent to Higher Volume Training.

Kevin T Mattocks1, Samuel L Buckner, Matthew B Jessee

  • 1Department of Health, Exercise Science, and Recreation Management, Kevser Ermin Applied Physiology Laboratory, The University of Mississippi, University, MS.

Medicine and Science in Sports and Exercise
|May 3, 2017
PubMed
Summary

Muscle growth and exercise volume did not significantly increase strength gains compared to simply practicing strength tests. Strength improvements in untrained individuals may be primarily due to practice effects.

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Area of Science:

  • Exercise Physiology
  • Muscle Adaptation
  • Strength Training Research

Background:

  • Understanding the drivers of muscle strength gains is crucial for optimizing training programs.
  • Distinguishing between strength adaptations due to muscle hypertrophy versus neural factors or practice effects is an ongoing area of research.

Purpose of the Study:

  • To investigate whether muscle growth (hypertrophy) or increased exercise volume is essential for enhancing muscle strength.
  • To determine if strength improvements can be solely attributed to the practice effect of repeated strength testing.

Main Methods:

  • Untrained individuals were assigned to either a high-volume resistance training group (HYPER) or a group performing only one repetition maximum (1RM) strength tests (TEST) for 8 weeks.
  • The HYPER group completed multiple sets to volitional failure, while the TEST group focused on maximal effort attempts during strength tests.

Main Results:

  • Muscle size increased more in the HYPER group, but changes in 1RM strength and torque were not significantly different between the HYPER and TEST groups.
  • The HYPER group showed greater improvements in muscular endurance for the dominant leg only.
  • Significant differences in total exercise volume were observed, with the HYPER group completing substantially more volume.

Conclusions:

  • Neither exercise volume nor the resulting muscle size changes contributed to greater strength gains compared to practicing the strength test.
  • These findings suggest that strength gains in untrained individuals may be largely explained by practice effects rather than muscle hypertrophy or training volume alone.