Enhanced Walking-Induced Fat Oxidation by New Zealand Blackcurrant Extract Is Body Composition-Dependent in Recreationally Active Adult Females

Nutrients. 2022 Apr 1;14(7):1475. doi: 10.3390/nu14071475.


New Zealand blackcurrant (NZBC) extract enhanced cycling-induced fat oxidation in female endurance athletes. We examined in recreationally active females the effects of NZBC extract on physiological and metabolic responses by moderate-intensity walking and the relationship of fat oxidation changes with focus on body composition parameters. Twelve females (age: 21 ± 2 y, BMI: 23.6 ± 3.1 kg·m-2) volunteered. Bioelectrical bioimpedance analysis was used for body composition measurements. Resting metabolic equivalent (1-MET) was 3.31 ± 0.66 mL·kg-1·min-1. Participants completed an incremental walking test with oxygen uptake measurements to individualize the treadmill walking speed at 5-MET. In a randomized, double-blind, cross-over design, the 30 min morning walks were in the same phase of each participant's menstrual cycle. No changes by NZBC extract were observed for walking-induced heart rate, minute ventilation, oxygen uptake, and carbon dioxide production. NZBC extract enhanced fat oxidation (10 responders, range: 10-66%). There was a significant correlation for changes in fat oxidation with body mass index; body fat% in legs, arms, and trunk; and a trend with fat oxidation at rest but not with body mass and habitual anthocyanin intake. The NZBC extract responsiveness of walking-induced fat oxidation is body composition-dependent and higher in young-adult females with higher body fat% in legs, arms, and trunk.

Keywords: anthocyanins; body composition; exercise; substrate oxidation.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adipose Tissue / metabolism
  • Adult
  • Body Composition
  • Female
  • Humans
  • New Zealand
  • Oxidation-Reduction
  • Oxygen / metabolism
  • Oxygen Consumption
  • Plant Extracts* / metabolism
  • Plant Extracts* / pharmacology
  • Ribes*
  • Walking / physiology
  • Young Adult


  • Plant Extracts
  • Oxygen