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January 9, 2021European Journal of Sport Science

Improved metabolic fitness, but no cardiovascular health effects, of a low‐frequency short‐term combined exercise programme in 50–70‐year‐olds with low fitness: A randomized controlled trial

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Why the study?

The cardiometabolic effects of a sports-club-implemented 15-week combined exercise programme in 50-70-year-olds with low aerobic fitness were unknown.

Does a 15-week combined exercise programme improve relative VO2max and cardiometabolic health in 50-70-year-olds with low aerobic fitness?

Population

45 participants (26 women) aged 50-70 years with low aerobic fitness

Comparison

15-week combined exercise programme vs inactive control

Design

Randomized controlled trial (2:1-ratio)

Follow-up

15 weeks

Authors

TNTina‐Thea NielsenUniversity of CopenhagenTMTrine Kjeldgaard MøllerSteno Diabetes CentersNONiels D. OlesenRigshospitalet

Discussion

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Implication

Combined exercise once weekly improves metabolic but not cardiovascular fitness in low-fit 50–70-year-olds; extends minimal-dose RCT evidence while questioning broad cardiometabolic benefits.

Key Points

  • This trial aimed to evaluate the cardiometabolic effects of a combined exercise program in older adults with low aerobic fitness.
  • 45 participants aged 50-70 were randomly assigned to a training group (n=30) or control group (n=15) over 15 weeks.
  • Training group had weekly supervised sessions in a sports club, combining aerobic and strength exercises.
  • Evaluations included VO2max, blood pressure, heart rate, and lipid profiles at baseline and week 15.
  • No significant differences in VO2max between groups (P=0.519) or cardiovascular outcomes (all P > 0.05).
  • Total fat mass decreased by 1.9 kg (95% CI -3.2 to -0.5, P=0.005) and fat percentage by 1.3% (P=0.01) in the training group.
  • Adherence to group training was high at 81%, while home-based exercise adherence was 0%.

Structured PICO

Does a 15-week combined exercise programme improve relative VO2max and cardiometabolic health in 50-70-year-olds with low aerobic fitness?

P
Population
45 adults (26 women) aged 50-70 years with low aerobic fitness.
I
Intervention
15-week combined exercise programme consisting of one weekly 90-min supervised group-based session (aerobic and strength training) in a recreational sports club, plus encouraged home-based training 30 min/wk.
C
Comparator
Inactive control group.
O
Outcome
Relative VO2max (mLO2/min/kg) at 15 weeks.surrogate

A 15-week low-frequency combined exercise program in untrained older adults improved metabolic parameters such as fat mass and lipid profile, but failed to improve cardiovascular fitness.

Cite This Study

Nielsen et al. (2021) studied this question.

synapsesocial.com/papers/6a6fa92f75498292b7090975https://doi.org/10.1080/17461391.2021.1874057
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