"The warm-ups and cool downs are designed to avoid repetitive strain injuries associated with seasonal work."
"It's definitely a hard job and we want them to understand how good stretching is for the body. The people I'm working with at T&G are awesome, really helpful in terms of what I am aiming to do."
Because some of the group members speak little English, Roberts is planning to produce posters with translated instructions to help Pasifika workers follow the exercise programme.
He has also created two illustrated manuals, one outlining a dynamic stretching plan and the other a static stretching plan.
Roberts also joins in with the exercises as the men start their day in the orchard, taking 10-15 minutes to guide them through the work-outs, and will often pop back at the end of the day for a cool-down session.
Originally from Auckland, Roberts said he wasn't focused at school and didn't know what to focus on as a career choice.
"When I was younger, I didn't know what I wanted to do. Being older and having life skills on my side I realise what's important."
Roberts said he would continue working with seasonal workers until they returned home to Vanuatu at the end of the season in mid September.