After escaping her own violent relationship seven years ago, Ms Lahti studied a PhD in applied psychology and later founded the Sisu Not Silence project to raise awareness of the issue.
Sisu is an ancient Finnish concept symbolising courage and determination in the face of adversity. Sisu Not Silence aims at creating a global-scale cultural shift that removes the stigma and shame around those who have experienced domestic violence.
"Much like running a thousand miles, healing from past trauma and impacting social change are also trials of endurance that begin by taking one step at a time" said Ms Lahti.
Ms Lahti's ambitious endeavour aims to highlight the strength of those who've experienced emotional, physical or sexual abuse.
If Ms Lahti completes her goal of 50 ultra runs in 50 days, she will break the world record for the most consecutive ultra runs by a woman.