Four experts show off their sporty style and help you select the best fitness wear for your workout.
Annie Foulds, 46, is a pro runner, personal trainer and Sweaty Betty ambassador who lives in London; anniefouldspersonaltrainer.com.
“Winter running requires hard-working fabrics that compress, and are thermal, wind- and rain-proof.”
Annie wears:
Grey hoodie, £125, Sweaty Betty
Luxe run backpack, £90, Sweaty Betty
Reflective running top, £26, Puma at Sweatshop
Leggings, £39.95, Gap
Trainers, £63, Reebok
Extra kit:
Thermal-compression leggings, £30.99, Glenmuir at sockshop.co.uk
Top, £35, Under Armout at wiggle.co.uk
Headphones, £79.99, Sennheiser
Thermal, rain-proof gilet, £50, Millets
Shock Absorber Bra, £38, Next
Nike Thermal 2.0 Run Gloves, £15, wiggle.co.uk

Exercise: Walking
Diana Moran, aka The Green Goddess, 76, is the editor of health and fitness website primetimelife.tv and has released her new fitness DVD, Easy Fit. Walking is part of Diana's regular fitness regime.
"Protection is key. Look for thermal base layers and a hooded weather-proof jacket that's light enough to store in your backpack once the sun shines."
Diana wears:
Weather-proof jacket, £118, lululemon
HeatTech gilet, £39.90, Uniqlo
Leggings, £55, Wellicious
Skechers GOWalk2, £49, Skechers
Extra kit:
Waterproof jacket, £132, Petit Bateau
Hoodie, £19.99, H&M
Backpack, £40, Eastpak
Trainers, £102, Asics Gel-Fuji Viper
Touch screen gloves, £5, ASOS

Exercise: Yoga
Nahid de Belgeonne, 48, is the founder and director of goodvibesfitness.co.uk and has just launched her yoga nidra guided meditation, available through her website.
"Super-soft fabrics that retain their shape are essential but, most of all, you need a proper yoga mat!"
Nahid wears:
Cardigan, £275, Wolford
Cooling vest, £27, HotSquash
Sweat pants, £222.68, prd_id=845524446814404&site_refer=AFF001&mid=37410&siteID=gcdL_ATRVoE-psUR8RUynD2ASlUMUzG0.A">Hanro
Extra kit:
Running Blossom Jacket, £145, Stella McCartney for Adidas
Grey Marl T-shirt, £7.99, New Look
Leggings, £21.95, Boody
Medium Impact Seamless Crop Top, £12.50, M&S
Yoga mat, £19.99, Gaiam at John Lewis
Liquid Yoga Bath Soak, £26, Mio

Exercise: The Gym
Elissa El Hadj, 37, is the founder of Form Studios in Notting Hill, London, and regularly works with celebrities. Cross-training forms part of Elissa's classes.
"Look and feel the part gym-side with sweat-wicking fabrics and trainers that offer support in all the right places."
Elissa wears:Hooded cropped sweater, £55, ZAAZEE
Vest, £62, Every Second Counts
Leggings, £82, lululemon
Trainers, £145, Adidas Boost
Extra kit:
Leggings, £59, Striders Edge at stylepb.com
Vest, £69.99, Stae Fit
Apple Watch Sport, £299, Apple
Water bottle, £9.99, bobble Sport
Nike Flyknit Trainers, £105, Office
Trainer socks, £8, Nike