Jessica Ennis-Hill tells new mums to 'give themselves time' before hitting the gym

She's just walked away with a silver medal in Rio to add to the gold she famously won at the London 2012 Olympics.but Jessica Ennis-Hill's proudest achievement to date remains 18-month-old son Reggie. Scroll down for video Jessica Ennis-Hill's flawless physique took plenty of hours in the gym after the birth of her son Reggie in 2014: the heptathlon star has been urging new mums to be cautious before exercising after giving birth Ennis-Hill has revealed it was 'extremely difficult' to get her physique back after Reggie, now 18 months, was born She told Cosmopolitan.co.uk that too many new mums put pressure on themselves to get their post-baby bodies back too quickly. She also urged parents of newborns not to rush back to the gym, saying: 'It takes time and I think it's really important that mums don't feel like they have to have the baby and then the next week start running and doing sit-ups, because it's not good for you physically or mentally and it's not going to help you. Ennis-Hill said: 'It's really important that mums don't feel like they have to have the baby and then the next week start running and doing sit-ups'.the star has admitted that if she does carry on in the sport it will only be for another year Sacrifice: Ennis- Hill said being away from her son during the Olympics was 'definitely one of the hardest things I've ever done' She revealed this week: 'I thought I'd spring back into shape the first time but I didn't at all…it took ages and I had loads of support from my coach, physio and doctor who understood what pregnancy had done to my body.