RecruitingBehavioural interventionStudy of Nutrition and Exercise in Adults Hospitalized for Treatment of Acute Lymphoblastic Leukemia (ALL)This clinical trial aims to assess the effect of nutrition and exercise on muscle and adiposity in adults with Philadelphia Chromosome (Ph) Negative B-ALL undergoing inpatient induction therapy. Participants will take part in 2 different interventions: * Nutrition Intervention * Physical Exercise Intervention All subjects will be provided with a wearable electronic activity monitor (FitBit®) to assist in recording activity levels in minutes of activity.