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RecruitingLast updated: 25 November 2025

Neo-ACT: A study evaluating effects of physical exercise during preoperative chemotherapy in people with breast cancerPhysical Exercise During Neoadjuvant Chemotherapy for Breast Cancer as a Means to Increase Pathological Complete Response Rates: the Randomized Neo-ACT Trial

Trial purpose

Medical clipboardCancer treatment

Tumor type

Breast Cancers Breast

Age

People18+

Trial acronym

Neo-ACT

Clinical summary

Summary

While it is known that physical exercise can help people to better tolerate and complete often harsh cancer treatments, it is an emerging area of research to understand if and how exercise exerts anti-tumour effects and improves cancer outcomes.

Neoadjuvant chemotherapy (NACT) is a type of chemotherapy used to treat breast cancer. The aim of this study is to examine if a physical exercise intervention during NACT can increase absence of invasive tumours on surgical histopathology taken after chemotherapy.

Eligible participants will be randomly allocated into two groups. One group will take part in high-intensity interval and strength training during their chemotherapy which includes two structured 60-minute exercise sessions per week from initiation of NACT to surgery (approximately 5 months). The other group will receive standard care which includes routine information on the benefit of physical activity, but no specific exercise sessions. 

Conditions

This trial is treating people with primary invasive breast cancer

Eligibility

Inclusion

Patients with primary invasive breast cancer cT1-T3 cN0-2
Full tumour biology available before initiation of NACT
Oral and written consent
Age = 18 years

Exclusion

Pregnancy or breast-feeding
Bilateral invasive breast cancer
The presence of musculoskeletal, neurological, respiratory, metabolic or cardiovascular conditions that may prevent safe completion of the exercise demands of the study
Currently performing equal to or more than 150 mins of moderate to high intensity aerobic exercise and 2 sessions per week of moderate intensity resistance exercise

Inclusion

  • Your cancer has not spread to other parts of the body (localised).
  • You have the type of cancer, symptoms, or health risks that this clinical trial is focused on.

Exclusion

  • You have certain types of non-cancer medical conditions.
Message

Clinical trials have complex eligibility criteria, and other criteria may apply for this trial. Ask your doctor about whether this trial could be right for you.

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More information

Trial Identifiers

Information on this page is partially produced from ClinicalTrials.gov *. View further details about this trial on the registry via the links below:

Trial sponsor

Karolinska Institutet

Scientific Title

Physical Exercise During Neoadjuvant Chemotherapy for Breast Cancer as a Means to Increase Pathological Complete Response Rates: the Randomized Neo-ACT Trial

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