Breakfast for Female Adolescent - NewStart (NewStart)

Investigators will test the long-term health effects of eating a dairy-based protein-rich breakfast and/or performing regular physical training for 12 weeks in 100 previous 'breakfast skipping' young overweight women (2 x 2 factorial design). Measurements of body composition, physical fitness, metabolic health parameters, faeces (microbiota activity and composition), satiety and daily energy intake will be collected.

The study is a 2×2-factorial randomized controlled trial with 4 study arms. The subjects will be randomly allocated to skip breakfast or eat high-protein yoghurt products (300g/day) and to either exercise 3x per week or maintain habitual physical activity for 12 weeks. Measurements and biological sampling will be performed at baseline and at the end of the intervention period. The primary outcome will be fat mass and fat free mass. The investigators will also measure effects on weigth, waiste, health-related blood paramenters, muscle function, metabolites in urine and blood, and gut microflora and pH.

Subject will consume a high protein dairy breakfast (300 g high protein yoghurt (skyr)) and maintain habitual physical activity.

Subject will skip breakfast and participate in organized exercise-training three times per week (and maintain habitual physical activity)

Subject will consume a high protein dairy breakfast (300 g high protein yoghurt (skyr)) and and participate in organized exercise-training three times per week (and maintain habitual physical activity)

High protein yoghurt containing approx. 10 g protein per 100 g. Participants will be asked to consume 300 g (=3 dl) for breakfast.

Inclusion Criteria: BMI >25 exercising < 1 h per week. Exclusion Criteria: smoking illness and use of medication affecting the study outcomes allergy towards milk and yoghurt weightloss/gain >5kg the last 6 months dieting eating disorder pregnancy breast feeding unable to speak and understand danish