Kayla Itsines Bikini Body Guide: Let's talk about getting ready for summer!

Every spring the same plan resurfaces: get fit before summer. It usually falls apart for the same reason, which is that "get fit" is not a plan. It does not say what to do on Tuesday, how long it takes or what happens when the week goes sideways. Structured programmes exist to fill that gap, and Kayla Itsines' Bikini Body Guide became one of the best known by doing exactly that.

What the guide is built around

Kayla Itsines is an Australian personal trainer who grew a large following on Instagram by sharing short, intense circuit workouts. Her guides turned those circuits into a weekly schedule: resistance sessions using bodyweight and simple equipment, combined with low- and high-intensity cardio and recovery days. The sessions are brief, change from week to week and can be done at home or in a gym. There is no secret formula; the appeal is a clear structure that removes daily decision-making.

That structure is why many beginners like the BBG Workout format: each session lists the exercises, rounds and timing, so you can put on your own playlist and get on with it.

Reasons it suits busy people

• Short sessions. A workout that fits into a lunch break is easier to protect than one that needs two hours and a commute.
• Variety. Exercises rotate, which keeps boredom at bay and works the whole body across a week.
• Little equipment. A mat, a few dumbbells and a bench or sturdy step cover most of it.
• Progression. The programme gets harder in stages, so effort keeps pace with improving fitness.

Setting expectations that last past summer

A season of consistent training can improve strength, stamina and energy, but changes in weight and body shape vary widely from person to person and depend heavily on sleep, food, stress and genetics. Before-and-after photos online show what happened for some people, not what will happen for everyone. A more reliable goal is behavioural: train three times a week for the next eight weeks and see what changes. It is also worth remembering that a bikini body is simply any body wearing a bikini; the real reward of training is feeling stronger and more capable.

Starting safely

High-intensity circuits are demanding. Jumps, burpees and fast lunges can be hard on joints for complete beginners or anyone returning after injury, pregnancy or a long break. Learn each movement slowly first, choose low-impact versions where offered, and rest when you need to. If you have a heart condition, high blood pressure or joint problems, are pregnant or have recently given birth, get the go-ahead from a GP or physiotherapist before taking on an intense programme.

Food that supports training

Training works best alongside regular meals with enough protein, plenty of vegetables, fruit and whole grains, and good hydration. Crash diets tend to leave people too tired to train and more likely to quit. If you have a history of disordered eating, or you want tailored nutrition advice, a GP or registered dietitian is the right person to talk to.