One study revealed no association of physical activity and energy intake with HAQ, DAS28, body fat, BMI, interleukin-1β, interleukin-6, TNFa, ESR, and CRP, in RA patients [34], while for RA and AS patients, one study showed no associations of physical activity levels and daily calorie as well as protein intake with sarcopenia [31]. Here, TNF is linked to sarcopenia.