Related Experiment Video
Updated: Jul 3, 2026

06:48
Clinical Anthropometrics and Body Composition from 3-Dimensional Optical Imaging
Published on: June 7, 2024
Body composition and performance in cross-country skiing.
P Larsson1, K Henriksson-Larsén
1Sports Medicine, Department of Surgical and Perioperative Science, University of Umeå, Sweden. peter.larsson@idrott.umu.se
International Journal of Sports Medicine
|July 5, 2008
Summary
Elite cross-country skiers
Area of Science:
- Sports Science
- Human Physiology
- Biomechanics
Background:
- Cross-country skiing demands significant physiological and biomechanical contributions.
- Understanding the role of body composition is crucial for optimizing athlete performance.
- Previous research has explored various anthropometric factors in endurance sports.
Purpose of the Study:
- To examine the relationship between body composition and cross-country skiing performance.
- To identify specific body composition variables that correlate with skiing speed and overall time.
- To provide insights into the importance of lean body mass for elite skiers.
Main Methods:
- Ten male elite college-aged cross-country skiers completed a 5.6-km time trial.
- Body composition was assessed using dual-energy X-ray absorptiometry (DXA).
- Speeds across different course sections were calculated using a differential global positioning system (dGPS).
Main Results:
- Total body weight and absolute lean body mass were significantly correlated with final race time.
- Absolute lean arm mass showed a negative correlation with final time.
- Relative lean arm mass was significantly related to speed, particularly on uphill sections.
Conclusions:
- Higher amounts of lean body mass, especially in the arms, are important for cross-country skiing performance.
- Lean arm mass appears to be a key factor influencing speed, particularly during climbing.
- These findings can inform training strategies for cross-country skiers aiming to improve performance.
Related Concept Videos
Exercise and Muscle Performance
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...
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...
Body Water Content and Fluid Compartments
Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions (Na+) and chloride...
Work Done Over an Inclined Plane
The center-of-mass framework helps to easily describe the work done on rigid bodies. Since the internal forces in a rigid body do no work, they can be ignored, and the external forces can be considered in the work-energy theorem.
The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
Exercise and Cardiovascular Response
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Exercise and Cardiac Output
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.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Sustained exercise increases the muscles' oxygen demand, which can be met...
Hypodermis
The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...

