100 ultramarathons in 100 days: former rugby pro hit by brain injury nears end of feat

David ‘Jacko’ Jackson has aimed to raise awareness of brain injuries, with fellow runners sharing their stories The key for David “Jacko” Jackson is to take each stage nice and gently. “It’s not about running fast,” he said. “It’s more like the hare and tortoise story. Slow and steady – and do it again tomorrow.” So far, so good. Jackson, a former professional rugby player who retired after a trau