The workplace has been suggested as a good setting for the promotion of healthy lifestyles. This article examines the impact of Activate Your Health programme, provided over an average of 1.35 years, on employee health and lifestyle habits (actual and intention to improve). Companies selected one of the programme’s four options (number of interventions in parentheses): Control (2), Light (8), Moderate (13) and High (14). Employees (n = 524) completed an online questionnaire at baseline and post-intervention. Mixed-effect models and generalized estimating equations models were used, where appropriate. There was an interaction effect of time by option for the number of employees intending to improve sleep habits (p = 0.030): +11.0% in Light (p = 0.013). No significant interaction effect of time by option was observed for body weight, body mass index, number of health problems or lifestyle habits (actual and intention to improve). When stratified by sex, there was an interaction effect of time by option for the number of women intending to improve sleep habits (p = 0.023): −26.1% in Moderate (p = 0.014). There was an interaction effect of time by option for body weight in men (p = 0.001): −0.58 kg in High (p = 0.031) and +2.58 kg in Control (p = 0.005). Other outcomes of interest were stable or improved post-intervention, regardless of option. The Activate Your Health programme allowed employees to maintain or improve outcomes related to health and lifestyle habits. A package like High may be beneficial for body weight regulation in men.