Marsh AP, Shea MK, Vance Locke RM, Miller ME, Isom S, Miller GD, Nicklas BJ, Lyles MF, Carr JJ, Kritchevsky SB. Resistance training and pioglitazone lead to improvements in muscle power during voluntary weight loss in older adults. J Gerontol A Biol Sci Med Sci. 2013 Jul; 68(7):828-36.