GSTM1 and anemia (phenotype): Neither HMB nor anaemia status impacted maximum grip strength (p > 0.05, Table 3); however, linear regression analysis of Hb against maximum grip strength showed a positive relationship (adjusted R2 = 0.012, F‐statistic = 8.524, p = 0.004, Figure 1), although the low adjusted R2 value suggests a weak relationship.