The Southern Steel captain is back training after giving birth to her second child, Indie, on November 10.
She showed she could get back into netball shape and return to the ANZ Championship in the past, after she and husband Trent had their first child, Archie (3), in 2012.
Frew, the most capped Steel player in franchise history with 91 caps, trained for the first time with the team in Invercargill on Wednesday.
"It's extremely tough,'' she said.
"Throughout the whole pregnancy it was on the back of my mind that I would be getting back out on to the netball court. I think that made me look after myself as well as I could: eating correctly, getting as much exercise as you can being pregnant.
"It's certainly going to be a tough few months ahead, but I'm really determined to get back to where I was before Indie was born and just really enjoy the season.''
The franchise has a plan in place to get Frew match-fit in time for the pre-season in late March, but she would not be training at the same intensity as the rest of the squad to start with, she said.
"I will certainly be trying to get there as soon as possible,'' the 31-year-old said.
"But not rushing it where I'm going to come out with niggles and not be able to handle the sessions.''
Frew, who will captain the team for a second consecutive year in this year's ANZ Championship, cannot wait to get back out on the court.
She said it gets more exciting to be playing every year, while it also gets more challenging in terms of having to be fitter, faster and stronger to meet the demands of the evolving competition.
The Steel opens the new season against the Northern Mystics in Auckland on April 1, but has a three-day pre-season tournament in Auckland on March 18-20.
Frew is aiming to be "charging'' come the first game in Auckland, but realises there is going to be "lots of hard slog'' between now and then.
After playing under former head coach Janine Southby for the past three years, Frew said she was excited about playing for new coach Noeline Taurua.
She replaced Southby, who was appointed head coach of the Silver Ferns last November, and will have all but one of her players in Invercargill to train next week.
Jamaican shooter Jhaniele Fowler-Reid will still be in Jamaica, but will join the squad the following week.
Only Frew, Stacey Peeters, Jane Watson, Brooke Leaver and Te Huinga Reo Selby-Rickit were in Invercargill to train this week, as the rest of the squad was occupied with their respective New Zealand camps.
"We have been planning things pretty heavily over the past six weeks and it's going to be pretty exciting when we all get back together and start working towards our goals,'' Frew said.
"We all inspire each other and push ourselves to the limit. We know if we train hard those games are going to be a little easier.''
Outside of getting back into netball, Frew is enjoying her expanded family. Archie was a good big brother to Indie and enjoyed having a sister around, she said.
"He's a top big brother. Lots of kisses and cuddles for her. It's great seeing them interact.''
