For Research Use Only. NAD+ is intended strictly for in vitro and preclinical animal research. It is not approved for human use, is not a drug, and should never be administered to humans.
NAD+ and Exercise Biology
Exercise produces substantial metabolic demands that require high NAD+ turnover in working muscle. The oxidative phosphorylation that generates most of the ATP during exercise depends on NAD+ as an essential electron carrier. Glycolysis, fatty acid oxidation, and amino acid metabolism all require NAD+ at multiple steps. The mitochondrial biogenesis that accompanies exercise training depends on NAD+ dependent sirtuin signaling. The DNA repair responses triggered by exercise induced metabolic stress require NAD+ dependent PARP activity.
The central role of NAD+ in exercise biology has made NAD+ and exercise research one of the most active areas in the broader NAD+ literature. Research examines how exercise affects NAD+ levels, how NAD+ supplementation affects exercise performance and adaptation, and how the two interventions interact in preclinical models.
The Nature subject hub on exercise and the ScienceDirect NAD+ exercise topic page archive primary research on the integrated exercise NAD+ biology.
Exercise Induced NAD+ Changes
Exercise acutely decreases muscle NAD+ levels during the exercise bout itself due to the increased turnover in active metabolism. The depletion is transient and muscle NAD+ levels recover during the post exercise period. The exercise induced NAD+ flux activates multiple NAD+ dependent signaling pathways that contribute to the adaptive response to training.
Chronic exercise training increases baseline muscle NAD+ levels and increases the NAD+ synthesis capacity through upregulation of salvage pathway enzymes including NAMPT. The trained muscle therefore has greater NAD+ reserves and greater capacity to handle the metabolic demands of subsequent exercise bouts. This adaptation is one of the cellular mechanisms that underlies improved exercise capacity with training.
The exercise induced NAD+ changes connect to the MOTS-c exercise article in the MOTS-c cluster because MOTS-c shares the mitochondrial biology that is central to exercise adaptation. Both compounds are involved in mitochondrial function and exercise response through related but distinct pathways.
Published NAD+ Supplementation in Exercise Research
Published research on NAD+ supplementation in exercise contexts documents effects on performance and adaptation endpoints. Rodent exercise performance studies examining treadmill endurance, voluntary wheel running, and specific muscle function tests report improved performance in NAD+ supplemented animals compared to vehicle controls.
The performance improvements reflect the increased NAD+ availability supporting the metabolic demands of exercise. Muscle mitochondrial function is enhanced, fatty acid oxidation capacity is increased, and the capacity to sustain aerobic metabolism at high workloads is improved. These adaptations produce measurable improvements in endurance capacity and in the ability to recover from exercise bouts.
The performance research has been extended into aging models where baseline NAD+ decline impairs exercise capacity. Published research in aged rodents documents partial restoration of exercise capacity with NAD+ supplementation, aligning with the broader aging research documented in the NAD+ in Research: A Comprehensive Review of Nicotinamide Adenine Dinucleotide Studies.
The Cell Press journal Cell Metabolism and the Wiley Online Library exercise physiology collection archive primary research on exercise NAD+ biology.
Mitochondrial Biogenesis and Exercise Adaptation
Exercise training stimulates mitochondrial biogenesis through PGC-1 alpha mediated transcriptional programs. PGC-1 alpha activity depends on SIRT1 deacetylation, which in turn depends on NAD+ availability. Adequate NAD+ levels therefore support the mitochondrial adaptation that produces the endurance capacity improvements that define exercise training.
Published research on NAD+ supplementation during exercise training documents enhanced mitochondrial biogenesis markers including increased mitochondrial density, increased expression of electron transport chain components, and improved mitochondrial function in working muscle. The combined NAD+ plus exercise approach produces larger mitochondrial adaptations than either intervention alone.
The mitochondrial biogenesis research connects to the NAD+ and Cellular Metabolism: Reviewing Mitochondrial Function Studies which covers the broader mitochondrial biology, and to the MOTS-c AMPK article which covers the AMPK pathway that interacts with mitochondrial biogenesis through exercise related signaling.
Recovery and Tissue Repair
Exercise produces microscopic muscle damage that requires repair processes for recovery and adaptation. The repair involves inflammatory signaling, satellite cell activation, protein synthesis, and gene expression changes that collectively rebuild the damaged tissue in a form that is better adapted to the specific exercise demands. NAD+ dependent processes are involved throughout this repair response.
Published research on NAD+ supplementation during recovery from exercise induced muscle damage documents accelerated recovery markers including faster resolution of muscle damage indicators, improved post-exercise protein synthesis rates, and faster recovery of functional performance. The recovery acceleration reflects the support of multiple NAD+ dependent repair processes operating simultaneously.
The recovery research connects to the BPC-157 muscle repair article which covers muscle repair from a different pharmacological perspective. The different compounds address muscle repair through different mechanisms and may be complementary in research programs that examine comprehensive muscle repair support.
Substrate Utilization During Exercise
NAD+ availability affects substrate utilization during exercise by supporting the oxidative metabolism of fatty acids and carbohydrates. Increased NAD+ levels support increased fatty acid oxidation capacity, which is particularly important for endurance exercise where fatty acid oxidation provides the majority of the energy requirement. The shift toward fatty acid oxidation spares muscle glycogen and supports sustained exercise capacity.
Published research using indirect calorimetry and muscle biopsy analysis documents shifts in substrate utilization patterns during exercise in NAD+ supplemented animals. The shifts align with improved endurance performance and with the expected effects of enhanced mitochondrial oxidative capacity.
The substrate utilization research connects to the GLP-3 RT energy expenditure article which covers substrate utilization shifts from the triple agonist perspective, and to the MOTS-c insulin sensitivity article which covers muscle glucose handling.