Fitness & Body

Beta-2 adrenergic receptor variant affecting receptor downregulation, exercise capacity, beta-agonist drug response, and cardiovascular function

3'UTR variant in PPARD that acts as the third tag in the elite athlete haplotype (rs2267668/rs2016520/rs1053049); TC carriers show enhanced skeletal muscle glucose uptake and insulin sensitivity; the A/C/C haplotype containing this C allele is dramatically underrepresented in elite athletes

Upstream regulatory variant that increases LPAR1 transcriptional activity in synovial cells, associated with elevated knee osteoarthritis susceptibility in Japanese populations

An FTO intron-8 variant in the same haplotype block as rs1420318, with emerging associations with bone mineral density and alcohol dependence susceptibility; distinct from the primary intron-1 obesity cluster

Intronic variant in MCF2L that acts as a synovial eQTL — A allele carriers have higher MCF2L expression in joint tissue and elevated osteoarthritis risk across large joints

Collagen fibril assembly variant linked to soft tissue injury risk

FTO intron 8 variant associated with nominal spine bone mineral density effects and alcohol dependence susceptibility; low LD with the rs9939609 obesity cluster

Regulatory variant in GDF5 affecting cartilage development and osteoarthritis risk in knees, hips, and spine

Long non-coding RNA regulating erythropoiesis, influencing hemoglobin levels and oxygen transport capacity in endurance athletes

Enzyme critical for energy production during high-intensity exercise; deficiency reduces sprint and power performance

Sp1 transcription factor binding site polymorphism affecting collagen production, bone mineral density, and osteoporotic fracture risk

Upstream promoter-region ACE variant on a separate LD block from the I/D polymorphism — the C allele is associated with young-onset hypertension

Beta-1 adrenergic receptor variant at position 49 affecting receptor downregulation kinetics, resting heart rate, heart failure prognosis, and endurance exercise capacity

Affects myostatin's ability to limit muscle growth, influencing muscle mass and strength response to training

Determines presence of alpha-actinin-3 protein in fast-twitch muscle fibers, influencing sprint/power vs endurance capacity

Missense variant in the DNA damage recognition gene XPC that reduces global-genome nucleotide excision repair capacity, affecting recovery from UV-induced damage, exercise-generated oxidative DNA lesions, and environmental carcinogen exposure

Promoter polymorphism that disrupts an Sp1-binding site and reduces MMP-2 enzyme production, affecting extracellular matrix remodeling in connective tissue and adipose tissue

The most common pathogenic mutation in FKRP causing limb-girdle muscular dystrophy R9 (LGMD R9) in European populations; homozygous carriers develop progressive proximal muscle weakness

Missense variant in WNT16 that substitutes glycine for arginine at position 82, reducing cortical bone mineral density and increasing fracture risk

Promoter variant affecting circulating IGF-1 levels and athletic performance potential

Wnt signaling co-receptor variant affecting bone mineral density and fracture risk

Intronic variant affecting cortical bone thickness, bone mineral density, and fracture risk

Intronic variant in the PGC-1alpha gene linked to population-specific type 2 diabetes risk and mitochondrial biogenesis regulation

Missense variant in LRP5 that substitutes valine for methionine at position 667, modestly reducing Wnt signaling and lowering bone mineral density — particularly in physically active individuals

Low-frequency missense variant in SYPL2 associated with morbid obesity susceptibility

Intronic PPARD variant that independently impairs hepatic fat mobilization during lifestyle intervention; C-allele carriers show smaller reductions in liver fat regardless of how much total body fat they lose, linking this locus specifically to ectopic liver lipid regulation rather than general adiposity

Angiotensinogen level variant affecting blood pressure, sodium sensitivity, and cardiovascular adaptation to exercise

Intronic variant in the mitochondrial biogenesis regulator NRF2, associated with endurance athletic performance and intermittent exercise capacity

Master mitochondrial biogenesis regulator — Ser482 variant reduces PGC-1alpha transcriptional activity, impairing mitochondrial production, aerobic capacity, and metabolic adaptation

Regulatory variant in the RANKL gene affecting bone mineral density and osteoporotic fracture risk