Age-related patterns of body composition and salivary testosterone among Ariaal men of Northern Kenya.

Testosterone and Marriage among Ariaal Men of Northern Kenya

Recent studies suggest that differential human male investment in mating (male-male competition and mate-seeking behavior) and parenting effort may be associated with variation in testosterone levels. The Ariaal present an interesting test case because marital relations tend to be aloof and direct paternal care minimal by cross-cultural standards. Polygyny is prevalent and increases with age, a...

Androgen receptor CAG repeats and body composition among Ariaal men.

To determine the population variation in the androgen receptor (AR) and its association with body composition in a subsistence population, we sampled 87 settled and 65 nomadic males ages 20+ among the Ariaal of northern Kenya. Anthropometric measures included height, body mass index, fat-free mass (FFM), upper arm muscle plus bone area (AMPBA), % body fat (%BF), suprailliac skinfold (SISF), and...

Brief communication: chronic undernutrition is associated with higher mucosal antibody levels among Ariaal infants of northern Kenya.

The immune activation that occurs with infection diverts energy from growth and can contribute to poor nutritional outcomes in developing infants and children. This study investigates the association between salivary immunoglobulin A (IgA) levels and growth outcomes among Ariaal infants of northern Kenya. The Ariaal are a group of settled northern Kenyan pastoralists who are under considerable ...

Is Settling Good for Pastoralists? The Effects of Pastoral Sedentarization on Children’s Nutrition, Growth, and Health Among Rendille and Ariaal of Marsabit District, Northern Kenya

The effects of a formal exercise training programme on salivary hormone concentrations and body composition in previously sedentary aging men

Alteration in body composition, physical function, and substrate metabolism occur with advancing age. These changes may be attenuated by exercise. This study examined whether twenty eight, previously sedentary males (62.5 ± 5.3 years of age; body mass of 89.7 ± 16.4 kg) adhering to the ACSM minimum guidelines for aerobic exercise for six weeks would improve exercise capabilities, body compositi...