"My fitness has improved hugely from low-impact, low exercise to hardcore training," Cummins said.
"I really struggled on my first few nights, but Hemi is such an inspiration and helps motivate the mind and body to defeat the pain barrier and obstacles that you never though you would get over.
"I have a lot more energy and giving up smoking has seem my health improve markedly."
Henderson thought she was reasonably fit, and had a bit of a head start from attending boxfit boot camp, but quickly found out how wrong she was.
"The boxing training is exceptionally physical and while you don't seem to realise that you are working that hard, you are drenched with sweat within minutes.
"I feel like I'm standing taller and feeling stronger physically and emotionally, and I'm thinking more carefully about what I'm eating."
Both women admitted they would be nervous when taking to the ring on fight night.
"I don't generally get nervous about things until the last minute when it's about to happen," Henderson said.
Cummins says she feels good at the moment but when it comes to the crunch will probably be terrified.
"I'm very excited and can't wait but will probably be nervous on the walk to the ring."
Dare Fight for Youth Fight Card
Michael Sharp (HOBEC) v Paul Wills (BNZ)
Paul Jamieson (Staples Rodway/Bethlehem Coachlines) v Damien Hermond (Placemakers)
Deirdre Lack (Oceanblue Health Club) v Laura Eccleston (Global Fitness)
Alan Hammonds (MSC Engineering) v Shane Hodge (Robert Page Engineering)
Matt Barnett (Page Macrae Engineering) v Paul Sowerby (Robert Page Engineering)
Brodie Cummins (Cambridge Homes BOP) v Fiona Henderson (Eves Real Estate)
Shayne Nelson v Aaron Fraser (Ray White Commercial)
Luke Burgess (Westbay Real Estate) v Karl Blinkhorne (Blue Light NZ)
Phil Comeskey (Ebbett Holden) v Damian Palmer (Ultimate Motor Group)