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Related Experiment Video

Updated: Jun 9, 2026

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

Mitochondrial function and insulin resistance during aging: a mini-review.

Esther Phielix¹, Julia Szendroedi, Michael Roden

¹Institute for Clinical Diabetology, German Diabetes Center, Düsseldorf, Germany.

|August 28, 2010

Summary

Insulin resistance in the elderly is not caused by aging itself but by unhealthy lifestyles. Mitochondrial function declines with age, but insulin sensitivity is independent of this decline.

Related Experiment Videos

Last Updated: Jun 9, 2026

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

Area of Science:

Gerontology
Metabolic Health
Mitochondrial Biology

Background:

Insulin resistance and type 2 diabetes are common in older adults, linked to reduced aerobic performance and increased body fat.
These metabolic issues may stem from age-related energy metabolism decline or lifestyle factors.

Purpose of the Study:

To determine if insulin sensitivity and mitochondrial oxidative capacity are independently affected by aging and type 2 diabetes.

Main Methods:

Analysis of studies on elderly individuals using advanced techniques like electron microscopy, magnetic resonance spectroscopy, and high-resolution respirometry.
Assessment of insulin sensitivity and mitochondrial oxidative capacity.

Main Results:

Type 2 diabetes is associated with insulin resistance and impaired muscle mitochondrial structure/function.
Reduced mitochondrial capacity leads to muscle fat accumulation, which further impairs insulin signaling and mitochondrial function.
Insulin sensitivity is not generally reduced with age when physical activity and body fat are controlled; lifestyle interventions show varied effects on insulin sensitivity and mitochondrial capacity.

Conclusions:

Low mitochondrial oxidative capacity in the elderly is likely acquired over a lifetime.
Insulin resistance is largely independent of age, primarily driven by lifestyle and genetic predisposition.
Insulin sensitivity and mitochondrial function may not be causally linked but can mutually influence each other during aging.